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Material for Database Class.

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master

List of commits:

Subject	Hash	Author	Date (UTC)
Week 2 edits, added quiz #1, couple of fixes, replaced single quote with double quotes.	3c9942731678900122088356db3a2cbabd99b9be	aubert@math.cnrs.fr	2020-08-27 19:00:13
Added ressource for makefile.	7696c44bca707646530a7dbb71bf2e05badaa306	aubert@math.cnrs.fr	2020-08-03 16:00:23
Crystal's final edits.	714e3030423a836c4ba07890f9aa5e45f58ad15a	aubert@math.cnrs.fr	2020-05-21 17:43:26
Converted an image into a figure (Movie example).	c55e61ed5d11631e908d99b14ef10a0a0247bda0	aubert@math.cnrs.fr	2020-05-20 20:58:41
Re-formatted SQL code.	915442a1ba4d8baa120343f98de5ee39d4ac45f6	aubert@math.cnrs.fr	2020-05-18 15:52:06
Fixed Known_bugs	5900c572928ec3b8c98c82fe4e95ebbe9aeee6c3	aubert@math.cnrs.fr	2020-05-15 18:19:36
Fixed contrib and enriched example.	04864c0ee2d4fa77b4e681ebf8049c4642bf1e67	aubert@math.cnrs.fr	2020-05-15 18:17:22
Fixed formatting mistake.	948a87c75b5d9aa8317feb5a0859d4efc23e95d6	aubert@math.cnrs.fr	2020-05-15 17:58:40
Cleaned SQL code.	4d39ebc5c1a3566ef4d3fa7afc8b2868f827c108	aubert@math.cnrs.fr	2020-05-15 17:41:00
Fixing few mistakes in code.	b7eb7a0e476f8e0c3c6d3e651fd80827a03dd127	aubert@math.cnrs.fr	2020-05-15 17:38:32
Fixing few mistakes in code.	2bc77d7ee4e82e6961ce123fb7c3e1c68cba59b5	aubert@math.cnrs.fr	2020-05-15 17:30:02
Testing and indenting SQL code.	a2b3bb4e242dd4980b94b25d11d6001459e2f0a0	aubert@math.cnrs.fr	2020-05-15 17:26:27
Clarified an example.	e68bac453ab427c132b55249e21a08166b112f31	aubert@math.cnrs.fr	2020-05-15 15:06:54
Edits in style.	47578b081f74e9ec706772fa70a3079957129542	aubert@math.cnrs.fr	2020-05-15 14:38:16
Added activity diagram.	11c9acfa88c398f7463d6e54f45ea48c8793caf1	aubert@math.cnrs.fr	2020-05-15 14:34:31
Added activity diagram.	995cf4f64c43601716f77bb46d1535025ea14d10	aubert@math.cnrs.fr	2020-05-15 14:33:30
Edits in intro, converted an image to a figure for example of class diagram.	1ff4ef2f7f44ece81972a6c77e9f6654c144fcdc	aubert@math.cnrs.fr	2020-05-14 22:12:38
Adding example file, to test installation.	5ed35e64a4e4dc60c888358bde54594999aab34d	aubert@math.cnrs.fr	2020-05-13 19:03:41
Minor adjustments to the syllabus.	dca6f12d9d3d561755991029f2d53bf9823a8cea	aubert@math.cnrs.fr	2020-05-13 19:02:41
Worked on reverse-engineering section.	34aeba178fe553c08b4fb3738523be293704e09d	aubert@math.cnrs.fr	2020-05-13 18:52:09

Commit 3c9942731678900122088356db3a2cbabd99b9be - Week 2 edits, added quiz #1, couple of fixes, replaced single quote with double quotes.
Author: aubert@math.cnrs.fr
Author date (UTC): 2020-08-27 19:00
Committer name: aubert@math.cnrs.fr
Committer date (UTC): 2020-08-27 19:00
Parent(s): 7696c44bca707646530a7dbb71bf2e05badaa306
Signer:
Signing key:
Signing status: N
Tree: 672f251123878633a91e5af5142a2cc534ac5f90

File	Lines added	Lines deleted
KNOWN_BUGS.md	1	0
notes/code/sql/HW_Certificate.sql	19	15
notes/code/sql/HW_ConstraintsPart1.sql	1	1
notes/code/sql/HW_DBCoffee.sql	9	9
notes/code/sql/HW_Department.sql	1	1
notes/code/sql/HW_Faculty.sql	1	1
notes/code/sql/HW_ProcedureExamples.sql	3	3
notes/code/sql/HW_ProfExample.sql	27	27
notes/code/sql/HW_ResidencySol.sql	21	21
notes/code/sql/HW_SocialMedia.sql	9	9
notes/code/sql/HW_Storm.sql	17	16
notes/code/sql/HW_TriggerExample.sql	10	10
notes/code/sql/HW_Work.sql	24	23
notes/lectures_notes.md	17	7

File KNOWN_BUGS.md changed (mode: 100644) (index 83b20eb..32b15de)
...	...	CONTENT TO ADD
9	9	- Add content on Security and "Recognize professional responsibilities and make informed judgments in computing practice based on legal and ethical principles."	- Add content on Security and "Recognize professional responsibilities and make informed judgments in computing practice based on legal and ethical principles."
10	10	- Mention / discuss propagate options, and UNIQUE / NOT NULL, etc. options on particular attributes, during the discussion on how to map E.R. diagram to the relational model.	- Mention / discuss propagate options, and UNIQUE / NOT NULL, etc. options on particular attributes, during the discussion on how to map E.R. diagram to the relational model.
11	11	- Explain what "try-with-ressource" is in Java (cf. <https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html>, and remove the call to the close() after explaining that Statement and Connection are auto-closeable. (<https://docs.oracle.com/javase/7/docs/api/java/sql/Connection.html>, <https://docs.oracle.com/javase/7/docs/api/java/sql/Statement.html>).	- Explain what "try-with-ressource" is in Java (cf. <https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html>, and remove the call to the close() after explaining that Statement and Connection are auto-closeable. (<https://docs.oracle.com/javase/7/docs/api/java/sql/Connection.html>, <https://docs.oracle.com/javase/7/docs/api/java/sql/Statement.html>).
	12		- Add content on hashing techniques, data storage mechanisms.
12	13
13	14	TO ANSWER	TO ANSWER
14	15	=========	=========

File notes/code/sql/HW_Certificate.sql changed (mode: 100644) (index 817947b..a11be3d)
...	...	SELECT CN
47	47	FROM CERTIFICATE;	FROM CERTIFICATE;
48	48
49	49	-- (.wikimedia.org \| .fsf.org \| *.shadytest.org \|	-- (.wikimedia.org \| .fsf.org \| *.shadytest.org \|
	50		-- *.wikipedia.org)
	51		-- The SN of the organizations whose CN contains
	52		-- "Foundation"
50	53	SELECT SN	SELECT SN
51	54	FROM ORGANIZATION	FROM ORGANIZATION
52	55	WHERE CN LIKE "%Foundation%";	WHERE CN LIKE "%Foundation%";
53	56
54	57	-- (01 \| 02)	-- (01 \| 02)
	58		-- The CN and expiration date of all the certificates
	59		-- that
	60		-- expired (assuming we are the 6th of December 2019).
55	61	SELECT CN, Valid_Until	SELECT CN, Valid_Until
56	62	FROM CERTIFICATE	FROM CERTIFICATE
57	63	WHERE Valid_Until < DATE '20191206';	WHERE Valid_Until < DATE '20191206';
58	64
59	65	-- (*.fsf.org, 2019-10-10)	-- (*.fsf.org, 2019-10-10)
	66		-- The CN of the CA that are not trusted.
60	67	SELECT CN	SELECT CN
61	68	FROM CA	FROM CA
62	69	WHERE Trusted IS NOT TRUE;	WHERE Trusted IS NOT TRUE;
63	70
64	71	-- (Shady Corp. \| NewComer Ltd.)	-- (Shady Corp. \| NewComer Ltd.)
	72		-- The CN of the certificates that are signed by a CA
	73		-- that
	74		-- is not trusted.
65	75	SELECT CERTIFICATE.CN	SELECT CERTIFICATE.CN
66	76	FROM CERTIFICATE, CA	FROM CERTIFICATE, CA
67	77	WHERE Trusted IS NOT TRUE	WHERE Trusted IS NOT TRUE
68	78	AND CA.SN = CERTIFICATE.Issuer;	AND CA.SN = CERTIFICATE.Issuer;
69	79
70	80	-- (Shady Corp. \| NewComer Ltd.)	-- (Shady Corp. \| NewComer Ltd.)
	81		-- The number of certificates signed by the CA whose CN
	82		-- is
	83		-- "Let's encrypt".
71	84	SELECT COUNT(CERTIFICATE.SN) AS "Number of certificates signed	SELECT COUNT(CERTIFICATE.SN) AS "Number of certificates signed
72	85	by Let's encrypt"	by Let's encrypt"
73	86	FROM CERTIFICATE, CA	FROM CERTIFICATE, CA

...	...	WHERE CERTIFICATE.Issuer = CA.SN
85	88	AND CA.CN = "Let's encrypt";	AND CA.CN = "Let's encrypt";
86	89
87	90	-- (2)	-- (2)
	91		-- A table listing the CN of the organizations along with
	92		-- the CN of their certificates.
88	93	SELECT ORGANIZATION.CN AS Organization, CERTIFICATE.CN AS	SELECT ORGANIZATION.CN AS Organization, CERTIFICATE.CN AS
89	94	Certificate	Certificate
90	95	FROM ORGANIZATION, CERTIFICATE	FROM ORGANIZATION, CERTIFICATE
91	96	WHERE CERTIFICATE.Org = ORGANIZATION.SN;	WHERE CERTIFICATE.Org = ORGANIZATION.SN;
92	97
93	98	-- ( Wikimedia Foundation, *.wikimedia.org \| Free Software	-- ( Wikimedia Foundation, *.wikimedia.org \| Free Software
	99		-- Foundation, *.fsf.org \| Free Software Foundation ,
	100		-- *.shadytest.org \| Wikimedia Foundation ,
	101		-- *.wikipedia.org
	102		-- )
94	103	/*	/*
95	104	DELETE FROM CA WHERE SN = 'A';	DELETE FROM CA WHERE SN = 'A';
96	105	ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`HW_Certificate`.`CERTIFICATE`, CONSTRAINT `CERTIFICATE_ibfk_2` FOREIGN KEY (`Issuer`) REFERENCES `CA` (`SN`))	ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`HW_Certificate`.`CERTIFICATE`, CONSTRAINT `CERTIFICATE_ibfk_2` FOREIGN KEY (`Issuer`) REFERENCES `CA` (`SN`))

File notes/code/sql/HW_ConstraintsPart1.sql changed (mode: 100644) (index 489a33b..c8a2dff)
...	...	CREATE TABLE HURRICANE (
9	9	NAME VARCHAR(25) PRIMARY KEY, WindSpeed INT DEFAULT 76	NAME VARCHAR(25) PRIMARY KEY, WindSpeed INT DEFAULT 76
10	10	CHECK (WindSpeed > 74 AND WindSpeed < 500),	CHECK (WindSpeed > 74 AND WindSpeed < 500),
11	11	-- 75mph is the minimum to be considered as a hurricane	-- 75mph is the minimum to be considered as a hurricane
12		-- cf. https://www.hwn.org/resources/bws.html
	12		-- cf. https://www.hwn.org/resources/bws.html
13	13	Above VARCHAR(25)	Above VARCHAR(25)
14	14	);	);
15	15

File notes/code/sql/HW_DBCoffee.sql changed (mode: 100644) (index 230099a..35c177b)
...	...	INSERT INTO COFFEE
61	61	VALUES (002, "Peru", "Decaf", 3.00);	VALUES (002, "Peru", "Decaf", 3.00);
62	62
63	63	-- The following statement raises an error.	-- The following statement raises an error.
	64		-- INSERT INTO PROVIDER
	65		-- VALUES (NULL, "contact@localcof.com");
	66		-- ERROR 1048 (23000) at line 68: Column 'Name' cannot be
	67		-- null
64	68	INSERT INTO SUPPLY	INSERT INTO SUPPLY
65	69	VALUES ("Johns & Co.", 121);	VALUES ("Johns & Co.", 121);
66	70
67	71	-- The following statement raises an error.	-- The following statement raises an error.
	72		-- -INSERT INTO SUPPLY
	73		-- VALUES ("Coffee Unl.", 311, 221);
	74		-- ERROR 1136 (21S01): Column count doesn't match value
	75		-- count at row 1
	76		-- Rest the changes:
68	77	ROLLBACK;	ROLLBACK;
69	78
70	79	-- Question 3:	-- Question 3:

File notes/code/sql/HW_Department.sql changed (mode: 100644) (index 96e0329..aa23331)
5	5	DROP SCHEMA IF EXISTS HW_Department;	DROP SCHEMA IF EXISTS HW_Department;
6	6
7	7	-- Carefull, we are dropping the schema HW_Department if it	-- Carefull, we are dropping the schema HW_Department if it
	8		-- exists already, and all the data in it.
8	9	CREATE SCHEMA HW_Department;	CREATE SCHEMA HW_Department;
9	10
10	11	-- And then re-creating it.	-- And then re-creating it.

File notes/code/sql/HW_Faculty.sql changed (mode: 100644) (index e53f345..1d6be25)
...	...	INSERT INTO PROF
62	62	290, 'PhD', 0, NULL, '19940101', -- Or '940101', '1994-01-01', '94/01/01'	290, 'PhD', 0, NULL, '19940101', -- Or '940101', '1994-01-01', '94/01/01'
63	63	'090500', -- Or '09:05:00', '9:05:0', '9:5:0', '090500'	'090500', -- Or '09:05:00', '9:05:0', '9:5:0', '090500'
64	64	-- Note also the existence of DATETIME, with 'YYYY-MM-DD	-- Note also the existence of DATETIME, with 'YYYY-MM-DD
65		-- HH:MM:SS'
	65		-- HH:MM:SS'
66	66	'Apple' -- This is not case-sensitive, oddly enough.	'Apple' -- This is not case-sensitive, oddly enough.
67	67	);	);

File notes/code/sql/HW_ProcedureExamples.sql changed (mode: 100644) (index a1638a9..5ee7e4d)
...	...	BEGIN
27	27	END;	END;
28	28	$$	$$
29	29	-- This is the delimiter that marks the end of the procedure	-- This is the delimiter that marks the end of the procedure
	30		-- definition.
30	31	DELIMITER ;	DELIMITER ;
31	32
32	33	-- Now, we want ";" to be the "natural" delimiter again.	-- Now, we want ";" to be the "natural" delimiter again.

...	...	DELIMITER ;
54	54	SHOW CREATE PROCEDURE STUDENTLOGIN;	SHOW CREATE PROCEDURE STUDENTLOGIN;
55	55
56	56	-- This display information about the procedure just created.	-- This display information about the procedure just created.
	57		-- We can pass quite naturally an argument to our
	58		-- procedure.
57	59	CALL STUDENTLOGIN ("Test A");	CALL STUDENTLOGIN ("Test A");
58	60
59	61	-- end snippet procedure-3	-- end snippet procedure-3

File notes/code/sql/HW_ProfExample.sql changed (mode: 100644) (index d56b982..34d394d)
...	...	CREATE TABLE GRADE (
37	37	-- end snippet tables-2	-- end snippet tables-2
38	38	-- start snippet insert-1	-- start snippet insert-1
39	39	INSERT INTO DEPARTMENT	INSERT INTO DEPARTMENT
40		VALUES ('MATH', 'Mathematics', NULL), ('CS', 'Computer
41		Science', NULL);
	40		VALUES ("MATH", "Mathematics", NULL), ("CS", "Computer
	41		Science", NULL);
42	42
43	43	-- end snippet insert-1	-- end snippet insert-1
44	44	-- start snippet insert-2	-- start snippet insert-2
45	45	INSERT INTO DEPARTMENT (Code, Name)	INSERT INTO DEPARTMENT (Code, Name)
46		VALUES ('CYBR', 'Cyber Secturity');
	46		VALUES ("CYBR", "Cyber Secturity");
47	47
48	48	-- end snippet insert-2	-- end snippet insert-2
49	49	-- start snippet insert-3	-- start snippet insert-3
50	50	INSERT INTO PROF (LOGIN, Department, Name)	INSERT INTO PROF (LOGIN, Department, Name)
51		VALUES ('caubert', 'CS', 'Clément Aubert');
	51		VALUES ("caubert", "CS", "Clément Aubert");
52	52
53	53	INSERT INTO PROF (LOGIN, Name, Department)	INSERT INTO PROF (LOGIN, Name, Department)
54		VALUES ('aturing', 'Alan Turing', 'CS'), ('perdos', 'Paul
55		Erdős', 'MATH'), ('bgates', 'Bill Gates', 'CYBR');
	54		VALUES ("aturing", "Alan Turing", "CS"), ("perdos", "Paul
	55		Erdős", "MATH"), ("bgates", "Bill Gates", "CYBR");
56	56
57	57	INSERT INTO STUDENT (LOGIN, Name, Registered, Major)	INSERT INTO STUDENT (LOGIN, Name, Registered, Major)
58		VALUES ('jrakesh', 'Jalal Rakesh', DATE '2017-12-01',
59		'CS'), ('svlatka', 'Sacnite Vlatka', '2015-03-12',
60		'MATH'), ('cjoella', 'Candice Joella', '20120212',
61		'CYBR'), ('aalyx', 'Ava Alyx', 20121011, 'CYBR'),
62		('caubert', 'Clément Aubert', NULL, 'CYBR');
	58		VALUES ("jrakesh", "Jalal Rakesh", DATE "2017-12-01",
	59		"CS"), ("svlatka", "Sacnite Vlatka", "2015-03-12",
	60		"MATH"), ("cjoella", "Candice Joella", "20120212",
	61		"CYBR"), ("aalyx", "Ava Alyx", 20121011, "CYBR"),
	62		("caubert", "Clément Aubert", NULL, "CYBR");
63	63
64	64	INSERT INTO GRADE	INSERT INTO GRADE
65		VALUES ('jrakesh', 3.8), ('svlatka', 2.5);
	65		VALUES ("jrakesh", 3.8), ("svlatka", 2.5);
66	66
67	67	-- end snippet insert-3	-- end snippet insert-3
68	68	-- start snippet select-update	-- start snippet select-update

...	...	FROM STUDENT;
71	71
72	72	UPDATE	UPDATE
73	73	DEPARTMENT	DEPARTMENT
74		SET Head = 'aturing'
75		WHERE Code = 'MATH';
	74		SET Head = "aturing"
	75		WHERE Code = "MATH";
76	76
77	77	UPDATE	UPDATE
78	78	DEPARTMENT	DEPARTMENT
79		SET Head = 'bgates'
80		WHERE Code = 'CS'
81		OR Code = 'CYBR';
	79		SET Head = "bgates"
	80		WHERE Code = "CS"
	81		OR Code = "CYBR";
82	82
83	83	SELECT LOGIN	SELECT LOGIN
84	84	FROM STUDENT	FROM STUDENT
85		WHERE NOT Major = 'CYBR';
	85		WHERE NOT Major = "CYBR";
86	86
87	87	SELECT LOGIN, Name	SELECT LOGIN, Name
88	88	FROM PROF	FROM PROF
89		WHERE Department = 'CS';
	89		WHERE Department = "CS";
90	90
91	91	SELECT LOGIN	SELECT LOGIN
92	92	FROM STUDENT	FROM STUDENT
93		WHERE Major = 'CYBR'
94		AND Registered > DATE '20121001';
	93		WHERE Major = "CYBR"
	94		AND Registered > DATE "20121001";
95	95
96	96	SELECT LOGIN	SELECT LOGIN
97	97	FROM STUDENT	FROM STUDENT
98		WHERE Name LIKE 'Ava%';
	98		WHERE Name LIKE "Ava%";
99	99
100	100	SELECT Name	SELECT Name
101	101	FROM PROF	FROM PROF
102		WHERE LOGIN LIKE '_aubert';
	102		WHERE LOGIN LIKE "_aubert";
103	103
104	104	-- end snippet select-update	-- end snippet select-update
105	105	-- start snippet null	-- start snippet null
106	106	INSERT INTO DEPARTMENT	INSERT INTO DEPARTMENT
107		VALUES ('Hist', 'History', NULL);
	107		VALUES ("Hist", "History", NULL);
108	108
109	109	SELECT *	SELECT *
110	110	FROM DEPARTMENT	FROM DEPARTMENT

...	...	WHERE DEPARTMENT.Name = "Mathematics"
142	142	AND Department = Code;	AND Department = Code;
143	143
144	144	-- end snippet select-project-join-1	-- end snippet select-project-join-1
	145		-- start snippet select-project-join-2
145	146	SELECT Name	SELECT Name
146	147	FROM STUDENT, GRADE	FROM STUDENT, GRADE
147	148	WHERE Grade > 3.0	WHERE Grade > 3.0
148	149	AND STUDENT.Login = GRADE.Login;	AND STUDENT.Login = GRADE.Login;
149	150
150	151	-- end snippet select-project-join-2	-- end snippet select-project-join-2
	152		-- start snippet select-project-join-3
151	153	SELECT PROF.Name	SELECT PROF.Name
152	154	FROM PROF, DEPARTMENT, STUDENT	FROM PROF, DEPARTMENT, STUDENT
153	155	WHERE STUDENT.Name = "Ava Alyx"	WHERE STUDENT.Name = "Ava Alyx"

...	...	FROM PROF
226	226	WHERE DEPARTMENT IN (	WHERE DEPARTMENT IN (
227	227	SELECT Major	SELECT Major
228	228	FROM STUDENT	FROM STUDENT
229		WHERE LOGIN LIKE '%a');
	229		WHERE LOGIN LIKE "%a");
230	230
231	231	-- end snippet whodunit	-- end snippet whodunit
232	232	-- start snippet transf-1a	-- start snippet transf-1a

File notes/code/sql/HW_ResidencySol.sql changed (mode: 100644) (index 4c2f3a2..29ba036)
...	...	INSERT INTO RESIDENCY
54	54	the next question.	the next question.
55	55	*/	*/
56	56	-- Exercise 4	-- Exercise 4
	57		-- List the rows (i.e., P.2, H.1, or even “none”)
	58		-- modified by the following statements:
57	59	START TRANSACTION;	START TRANSACTION;
58	60
59	61	UPDATE	UPDATE

...	...	ROLLBACK;
84	84	START TRANSACTION;	START TRANSACTION;
85	85
86	86	-- Commented, because it causes an error.	-- Commented, because it causes an error.
	87		-- DELETE FROM PERSON
	88		-- WHERE Birthdate = DATE "1990-02-11";
	89		-- None, because of the foreign key and the referential
	90		-- integrity constraint.
	91		-- ERROR 1451 (23000): Cannot delete or update a parent
	92		-- row:
	93		-- a foreign key constraint fails
	94		-- (`HW_RESIDENCY_SOL`.`RESIDENCY`, CONSTRAINT
	95		-- `RESIDENCY_ibfk_1` FOREIGN KEY (`Person`) REFERENCES
	96		-- `PERSON` (`SSN`))
87	97	ROLLBACK;	ROLLBACK;
88	98
89	99	-- end snippet solution4	-- end snippet solution4

...	...	SELECT Address
106	106	FROM HOUSE;	FROM HOUSE;
107	107
108	108	-- … the SSN of the persons whose first name was not	-- … the SSN of the persons whose first name was not
	109		-- entered in the system (000-00-0000).
109	110	SELECT SSN	SELECT SSN
110	111	FROM PERSON	FROM PERSON
111	112	WHERE FName IS NULL;	WHERE FName IS NULL;

...	...	SELECT DISTINCT COLOR
116	116	FROM HOUSE;	FROM HOUSE;
117	117
118	118	-- … the address of the residency of James Baldwin (123	-- … the address of the residency of James Baldwin (123
	119		-- Main St.).
119	120	SELECT House	SELECT House
120	121	FROM RESIDENCY, PERSON	FROM RESIDENCY, PERSON
121	122	WHERE PERSON.Fname = "James"	WHERE PERSON.Fname = "James"

...	...	WHERE PERSON.Fname = "James"
124	124	AND PERSON.SSN = RESIDENCY.Person;	AND PERSON.SSN = RESIDENCY.Person;
125	125
126	126	-- … the first name of the oldest person in the database	-- … the first name of the oldest person in the database
	127		-- (James).
127	128	SELECT FName	SELECT FName
128	129	FROM PERSON	FROM PERSON
129	130	WHERE Birthdate = (	WHERE Birthdate = (

...	...	WHERE Birthdate = (
133	133	WHERE Birthdate IS NOT NULL);	WHERE Birthdate IS NOT NULL);
134	134
135	135	-- … Michael Keal’s principal residency address (123 Main	-- … Michael Keal’s principal residency address (123 Main
	136		-- St.).
136	137	SELECT RESIDENCY.House	SELECT RESIDENCY.House
137	138	FROM RESIDENCY, PERSON	FROM RESIDENCY, PERSON
138	139	WHERE PERSON.FName = "Michael"	WHERE PERSON.FName = "Michael"

...	...	WHERE PERSON.FName = "Michael"
142	142	AND RESIDENCY.PrincipalResidence = TRUE;	AND RESIDENCY.PrincipalResidence = TRUE;
143	143
144	144	-- … the (distinct) first and last names of the homeowners	-- … the (distinct) first and last names of the homeowners
	145		-- (Michael Keal, Mridula Warrier).
145	146	SELECT DISTINCT (PERSON.FName), PERSON.LName	SELECT DISTINCT (PERSON.FName), PERSON.LName
146	147	FROM PERSON, RESIDENCY	FROM PERSON, RESIDENCY
147	148	WHERE RESIDENCY.Status = "own"	WHERE RESIDENCY.Status = "own"

...	...	WHERE SSN IN ( SELECT DISTINCT (RESIDENCY.Person)
156	156	WHERE RESIDENCY.Status = "own");	WHERE RESIDENCY.Status = "own");
157	157
158	158	-- … the SSN of the persons that have the same principal	-- … the SSN of the persons that have the same principal
	159		-- residency as James Baldwin (000-00-0001).
159	160	SELECT RoomMate.Person	SELECT RoomMate.Person
160	161	FROM RESIDENCY AS James, RESIDENCY AS RoomMate, PERSON	FROM RESIDENCY AS James, RESIDENCY AS RoomMate, PERSON
161	162	WHERE PERSON.FName = "James"	WHERE PERSON.FName = "James"

...	...	WHERE PERSON.FName = "James"
170	170	START TRANSACTION;	START TRANSACTION;
171	171
172	172	-- start snippet homonyms	-- start snippet homonyms
	173		-- If we have homonymns in our database, e.g.
173	174	INSERT INTO PERSON	INSERT INTO PERSON
174	175	VALUES ("A", "B", "000-00-0010", NULL), ("A", "B",	VALUES ("A", "B", "000-00-0010", NULL), ("A", "B",
175	176	"000-00-0011", NULL);	"000-00-0011", NULL);

...	...	INSERT INTO RESIDENCY
184	184	"H", TRUE, "own");	"H", TRUE, "own");
185	185
186	186	-- Then the query below fails, in the sense that it reports	-- Then the query below fails, in the sense that it reports
	187		-- the name "A, B" only once.
187	188	SELECT DISTINCT (PERSON.FName), PERSON.LName	SELECT DISTINCT (PERSON.FName), PERSON.LName
188	189	FROM PERSON, RESIDENCY	FROM PERSON, RESIDENCY
189	190	WHERE RESIDENCY.Status = "own"	WHERE RESIDENCY.Status = "own"
190	191	AND RESIDENCY.Person = PERSON.SSN;	AND RESIDENCY.Person = PERSON.SSN;
191	192
192	193	-- A better (and not much more complicated) solution would	-- A better (and not much more complicated) solution would
	194		-- have been
193	195	SELECT PERSON.FName, PERSON.LName	SELECT PERSON.FName, PERSON.LName
194	196	FROM PERSON	FROM PERSON
195	197	WHERE SSN IN ( SELECT DISTINCT (RESIDENCY.Person)	WHERE SSN IN ( SELECT DISTINCT (RESIDENCY.Person)

File notes/code/sql/HW_SocialMedia.sql changed (mode: 100644) (index 58d8848..965e270)
...	...	INSERT INTO SUBSCRIBE
39	39	"2019-03-03"), (1, 2, DATE "2019-03-03");	"2019-03-03"), (1, 2, DATE "2019-03-03");
40	40
41	41	-- The first entry means that 2 subscribed to 1, not the	-- The first entry means that 2 subscribed to 1, not the
	42		-- other way around.
	43		-- And similarly for the other entries.
42	44	INSERT INTO VIDEO	INSERT INTO VIDEO
43	45	VALUES (10, "My first video!", DATE "2020-02-02", 1),	VALUES (10, "My first video!", DATE "2020-02-02", 1),
44	46	(20, "My second video!", DATE "2020-02-03", 1), (30,	(20, "My second video!", DATE "2020-02-03", 1), (30,

...	...	INSERT INTO THUMBS_UP
63	63	-- start snippet solution	-- start snippet solution
64	64	/* code/sql/HW_SocialMedia.sql */	/* code/sql/HW_SocialMedia.sql */
65	65	-- … the title of all the videos ("My first video!", "My	-- … the title of all the videos ("My first video!", "My
	66		-- second video!", "My vacations").
66	67	SELECT TITLE	SELECT TITLE
67	68	FROM VIDEO;	FROM VIDEO;
68	69
69	70	-- … the release date of the video whose title is "My first	-- … the release date of the video whose title is "My first
	71		-- video!" ("2020-02-02").
70	72	SELECT Released	SELECT Released
71	73	FROM VIDEO	FROM VIDEO
72	74	WHERE Title = "My first video!";	WHERE Title = "My first video!";
73	75
74	76	-- … the ID of the account(s) where the "Name" attribute	-- … the ID of the account(s) where the "Name" attribute
	77		-- was not given ("2").
75	78	SELECT ID	SELECT ID
76	79	FROM ACCOUNT	FROM ACCOUNT
77	80	WHERE Name IS NULL;	WHERE Name IS NULL;
78	81
79	82	-- … the ID of the videos whose title contains the word	-- … the ID of the videos whose title contains the word
	83		-- "video" ("10", "20").
80	84	SELECT ID	SELECT ID
81	85	FROM VIDEO	FROM VIDEO
82	86	WHERE TITLE LIKE "%video%";	WHERE TITLE LIKE "%video%";

...	...	FROM VIDEO
91	91	WHERE Title REGEXP 'video';	WHERE Title REGEXP 'video';
92	92
93	93	-- … the number of thumbs up for the video with title "My	-- … the number of thumbs up for the video with title "My
	94		-- vacations" ("1").
94	95	SELECT COUNT(*)	SELECT COUNT(*)
95	96	FROM THUMBS_UP, VIDEO	FROM THUMBS_UP, VIDEO
96	97	WHERE VIDEO.Title = "My vacations"	WHERE VIDEO.Title = "My vacations"

...	...	ORDER BY Released ASC
118	118	LIMIT 1;	LIMIT 1;
119	119
120	120	-- … the names of the accounts who gave a thumbs up to the	-- … the names of the accounts who gave a thumbs up to the
	121		-- video with id 30 ("Bob Ross").
121	122	SELECT Name	SELECT Name
122	123	FROM ACCOUNT, THUMBS_UP	FROM ACCOUNT, THUMBS_UP
123	124	WHERE THUMBS_UP.Video = 30	WHERE THUMBS_UP.Video = 30
124	125	AND THUMBS_UP.Account = ACCOUNT.ID;	AND THUMBS_UP.Account = ACCOUNT.ID;
125	126
126	127	-- … the ID of the account with the greatest number of	-- … the ID of the account with the greatest number of
	128		-- subscribers ("2").
127	129	SELECT Subscribed	SELECT Subscribed
128	130	FROM SUBSCRIBE	FROM SUBSCRIBE
129	131	GROUP BY Subscribed	GROUP BY Subscribed

File notes/code/sql/HW_Storm.sql changed (mode: 100644) (index 590aab2..ba8c866)
...	...	INSERT INTO STORM
29	29	VALUES ('Harvey', 'Hurricane', 130, '2017-08-17');	VALUES ('Harvey', 'Hurricane', 130, '2017-08-17');
30	30
31	31	-- In the following, the entry gets created, but date is	-- In the following, the entry gets created, but date is
	32		-- "corrected" to '2017-17-08'!
	33		-- INSERT INTO STORM
	34		-- VALUES ('Dummy', 'Hurricane', 120, '2017-17-08');
	35		-- The error message returned is
	36		-- ERROR 1292 (22007) at line 34: Incorrect date value:
	37		-- '2017-17-08' for column `HW_STORM`.`STORM`.`Creation`
	38		-- at
	39		-- row 1
	40		-- In the following, we explicitely use 'DATE', and since
	41		-- the date is incorrect, nothing gets inserted.
	42		-- INSERT INTO STORM
	43		-- VALUES ('Dummy2', 'Hurricane', 120, DATE
	44		-- '2017-17-08');
	45		-- ERROR 1525 (HY000) at line 40: Incorrect DATE value:
	46		-- '2017-17-08'
	47		-- The next one sets NULL for DATE.
32	48	INSERT INTO STORM	INSERT INTO STORM
33	49	VALUES ('Irma', 'Tropical Storm', 102, DEFAULT);	VALUES ('Irma', 'Tropical Storm', 102, DEFAULT);
34	50

...	...	INSERT INTO STATE
59	60	VALUES ('Florida', 'FL', NULL);	VALUES ('Florida', 'FL', NULL);
60	61
61	62	-- This instruction is not using the primary key, is that a	-- This instruction is not using the primary key, is that a
	63		-- problem?
62	64	UPDATE	UPDATE
63	65	STATE	STATE
64	66	SET Affected_by = 'Harvey'	SET Affected_by = 'Harvey'

File notes/code/sql/HW_TriggerExample.sql changed (mode: 100644) (index e3cc065..c5ddeb3)
2	2	DROP SCHEMA IF EXISTS HW_TriggerExample;	DROP SCHEMA IF EXISTS HW_TriggerExample;
3	3
4	4	-- To drop only a trigger, you can use	-- To drop only a trigger, you can use
	5		-- DROP TRIGGER IF EXISTS
	6		-- HW_TriggerExample.NUMBER_OF_STUDENT_INC;
	7		-- DROP TRIGGER IF EXISTS
	8		-- HW_TriggerExample.NUMBER_OF_STUDENT_DEC;
5	9	CREATE SCHEMA HW_TriggerExample;	CREATE SCHEMA HW_TriggerExample;
6	10
7	11	USE HW_TriggerExample;	USE HW_TriggerExample;

...	...	CREATE TRIGGER STUDENT_AVERAGE
72	72	WHERE STUDENT.Login = NEW.Student;	WHERE STUDENT.Login = NEW.Student;
73	73
74	74	-- The "NEW" keyword here refers to the "new" entry	-- The "NEW" keyword here refers to the "new" entry
	75		-- that is being inserted by the INSERT statement
	76		-- triggering
	77		-- the trigger.
	78		-- end snippet trigger-3
75	79	INSERT INTO GRADE	INSERT INTO GRADE
76	80	VALUES ("A", "Exam 1", 50), ("A", "Exam 2", 40), ("B",	VALUES ("A", "Exam 1", 50), ("A", "Exam 2", 40), ("B",
77	81	"Exam 1", 80), ("B", "Exam 2", 100);	"Exam 1", 80), ("B", "Exam 2", 100);

...	...	SELECT *
87	87	FROM STUDENT;	FROM STUDENT;
88	88
89	89	-- Tada, all the averages have been computed!	-- Tada, all the averages have been computed!
	90		-- Note also that the student "C" does not have an
	91		-- average!

File notes/code/sql/HW_Work.sql changed (mode: 100644) (index cd7d88c..543f0bf)
...	...	INSERT INTO EBOOK
78	78	So, "Successful insertion".	So, "Successful insertion".
79	79	*/	*/
80	80	-- The following statement raises an error.	-- The following statement raises an error.
	81		-- INSERT INTO AUTHOR
	82		-- VALUES ("Mary B.", "mb@fai.fr", NULL);
81	83	/*	/*
82	84	ERROR 1136 (21S01): Column count doesn't match value count at row 1	ERROR 1136 (21S01): Column count doesn't match value count at row 1
83	85	So, "Other kind of error".	So, "Other kind of error".
84	86	*/	*/
85	87	-- The following statement raises an error.	-- The following statement raises an error.
	88		-- INSERT INTO WORK
	89		-- VALUES ("My Life", "Claude A.");
86	90	/*	/*
87	91	ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails	ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails
88	92	(`HW_EXAM_1`.`WORK`, CONSTRAINT `WORK_ibfk_1` FOREIGN KEY (`Author`) REFERENCES `AUTHOR` (`Name`)	(`HW_EXAM_1`.`WORK`, CONSTRAINT `WORK_ibfk_1` FOREIGN KEY (`Author`) REFERENCES `AUTHOR` (`Name`)

...	...	INSERT INTO BOOK
102	102	So, "Successful insertion".	So, "Successful insertion".
103	103	*/	*/
104	104	-- The following statement raises an error.	-- The following statement raises an error.
	105		-- INSERT INTO AUTHOR
	106		-- VALUES ("Virginia W.", "alt@isp.net");
105	107	/*	/*
106	108	ERROR 1062 (23000): Duplicate entry 'Virginia W.' for key 'PRIMARY'	ERROR 1062 (23000): Duplicate entry 'Virginia W.' for key 'PRIMARY'
107	109	So, "Entity integrity constraint".	So, "Entity integrity constraint".

...	...	WHERE Title = "What to eat";
149	149	Does not change any row.	Does not change any row.
150	150	*/	*/
151	151	-- The following statement raises an error.	-- The following statement raises an error.
	152		-- DELETE FROM AUTHOR
	153		-- WHERE Name = "Virginia W.";
152	154	/*	/*
153	155	ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails	ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails
154	156	(`HW_EXAM_1`.`BOOK`, CONSTRAINT `BOOK_ibfk_1` FOREIGN KEY (`Work`) REFERENCES `WORK` (`Title`) ON UPDATE CASCADE)	(`HW_EXAM_1`.`BOOK`, CONSTRAINT `BOOK_ibfk_1` FOREIGN KEY (`Work`) REFERENCES `WORK` (`Title`) ON UPDATE CASCADE)

...	...	WHERE Title = "What to eat";
159	159	ROLLBACK;	ROLLBACK;
160	160
161	161	-- We go back to the previous state.	-- We go back to the previous state.
	162		-- You can now assume that there is more data than what
	163		-- we
	164		-- inserted, if that helps you. Write a command that
	165		-- selects
	166		-- …
	167		-- We insert some dummy values for this next part.
162	168	INSERT INTO WORK	INSERT INTO WORK
163	169	VALUES ("My Life", "Paul B."), ("What to eat, 2", "Virginia W.");	VALUES ("My Life", "Paul B."), ("What to eat, 2", "Virginia W.");
164	170

...	...	SELECT Price
180	181	FROM EBOOK;	FROM EBOOK;
181	182
182	183	-- … the (distinct) names of the authors who have authored	-- … the (distinct) names of the authors who have authored
	184		-- a piece of work.
183	185	SELECT DISTINCT Author	SELECT DISTINCT Author
184	186	FROM WORK;	FROM WORK;
185	187

...	...	SELECT MAX(Price)
206	207	FROM BOOK;	FROM BOOK;
207	208
208	209	-- … the number of pieces of work written by the author	-- … the number of pieces of work written by the author
	210		-- whose name is “Virginia W.”.
209	211	SELECT COUNT(*)	SELECT COUNT(*)
210	212	FROM WORK	FROM WORK
211	213	WHERE WORK.Author = "Virginia W.";	WHERE WORK.Author = "Virginia W.";
212	214
213	215	-- … the email of the author who wrote the piece of work	-- … the email of the author who wrote the piece of work
	216		-- called “My Life”.
214	217	SELECT Email	SELECT Email
215	218	FROM AUTHOR, WORK	FROM AUTHOR, WORK
216	219	WHERE WORK.Title = "My Life"	WHERE WORK.Title = "My Life"
217	220	AND WORK.Author = AUTHOR.Name;	AND WORK.Author = AUTHOR.Name;
218	221
219	222	-- the isbn(s) of the book containing a work written by the	-- the isbn(s) of the book containing a work written by the
	223		-- author whose email is "vw@isp.net".
220	224	SELECT ISBN	SELECT ISBN
221	225	FROM BOOK, WORK, AUTHOR	FROM BOOK, WORK, AUTHOR
222	226	WHERE AUTHOR.Email = "vw@isp.net"	WHERE AUTHOR.Email = "vw@isp.net"

...	...	WHERE
245	246	they are both given the title "BANNED", which violates the unicity of value in primary keys.	they are both given the title "BANNED", which violates the unicity of value in primary keys.
246	247	*/	*/
247	248	-- Write one or multiple commands that would delete the work	-- Write one or multiple commands that would delete the work
	249		-- whose title is “My Life”, as well as all of the
	250		-- books
	251		-- and ebooks versions of it.
	252		-- The following statement raises an error.
	253		-- DELETE FROM WORK
	254		-- WHERE Title = "My Life";
248	255	/*	/*
249	256	Fails	Fails
250	257	ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails	ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails

File notes/lectures_notes.md changed (mode: 100644) (index da5788c..6d87395)
...	...	Go back to the CAR example and populate it with some data to "see" how those opt
941	941
942	942	## Exercises {-}	## Exercises {-}
943	943
	944		Exercise .+#
	945
	946		: What are the meta-data and the data called in the relational model?
	947
944	948	Exercise +.#	Exercise +.#
945	949	~	~
946	950

...	...	Exercise +.#
1115	1119
1116	1120	Solution +.#	Solution +.#
1117	1121
	1122		: The meta-data is called the _schema_, and the data is called the _relation state_. You can refer to the [diagram we studied at the beginnig of the Chapter](#concepts-1) for a reminder.
	1123
	1124		Solution +.#
	1125
1118	1126	: Row is Tuple, Column header is Attribute, Table is Relation.	: Row is Tuple, Column header is Attribute, Table is Relation.
1119	1127
1120	1128	Solution +.#	Solution +.#

...	...	Solution +.#
1209	1217	- $\{A\}$ is not a key, and not a superkey: multiple tuples have the value $1$.	- $\{A\}$ is not a key, and not a superkey: multiple tuples have the value $1$.
1210	1218
1211	1219	Solution +.#	Solution +.#
1212		~ Possible superkeys are $\{A, B, C, D\}$, $\{A, B, C\}$, $\{A, C, D\}$, $\{B, C, D\}$, $\{A, B\}$, $\{B, C\}$, . The possible keys are $\{A, B\}$ $\{A, C\}$, and $\{B, C\}$.
	1220		~ For this relation, $\{A, B, C, D\}$, $\{A, B, C\}$, and $\{D\}$ are superkey. Only the latter, $\{D\}$, is a key (for $\{A, B, C\}$, removing either $A$ or $C$ still gives a superkey).
1213	1221
1214	1222	Solution +.#	Solution +.#
1215		~ For this relation, $\{A, B, C, D\}$, $\{A, B, C\}$, and $\{D\}$ are superkey. Only the latter, $\{D\}$, is a key (for $\{A, B, C\}$, removing either $A$ or $C$ still gives a superkey).
	1223		~ Possible superkeys are $\{A, B, C, D\}$, $\{A, B, C\}$, $\{A, C, D\}$, $\{B, C, D\}$, $\{A, B\}$, $\{B, C\}$ . The possible keys are $\{A, B\}$ $\{A, C\}$, and $\{B, C\}$.
1216	1224
1217	1225	Solution +.#	Solution +.#
1218	1226	~	~

...	...	OFFERING (Department (PK, FK to DEPARTMENT.Name), Course (PK, FK to COURSE.Name)
1378	1386	## Resources {-}	## Resources {-}
1379	1387
1380	1388	- [@Textbook6, ch. 4--5], [@Textbook7, ch. 6--7] describes `SQL`, but none of its implementation.	- [@Textbook6, ch. 4--5], [@Textbook7, ch. 6--7] describes `SQL`, but none of its implementation.
1381		- To compare DBMS, you can look at their features, at <https://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems>, and at their popularity at <https://db-engines.com/en/ranking> and <https://insights.stackoverflow.com/survey/2019/#technology-_-databases> (if you sum up MySQL and MariaDB, they are first in both).
	1389		- To compare DBMS, you can look at their features, at <https://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems>, and at their popularity at <https://db-engines.com/en/ranking> and <https://insights.stackoverflow.com/survey/2020/#technology-databases> (if you sum up MySQL and MariaDB, they are first in both).
1382	1390	- MySQL and MariaDB have some differences, you can look them up at < https://mariadb.com/kb/en/mariadb-vs-mysql-features/> and <https://mariadb.com/kb/en/mariadb-vs-mysql-compatibility/>.	- MySQL and MariaDB have some differences, you can look them up at < https://mariadb.com/kb/en/mariadb-vs-mysql-features/> and <https://mariadb.com/kb/en/mariadb-vs-mysql-compatibility/>.
1383	1391
1384	1392	This chapter will be "code-driven": the code will illustrate and help you understand some concepts.	This chapter will be "code-driven": the code will illustrate and help you understand some concepts.
1385		You may want to have a look at the ["Setting Up Your Work Environment"](#sec:setup) Section, as early as possible in this lecture.
	1393		You may want to have a look at the ["Setting Up Your Work Environment"](#sec:setup) Section as early as possible in this lecture.
1386	1394	On top of being a step-by-step guide to install and configure a relational database managment system, it contains a list of useful links.	On top of being a step-by-step guide to install and configure a relational database managment system, it contains a list of useful links.
1387	1395
1388	1396	## Actors	## Actors

...	...	They will be studied separately, in the [Presentation of NoSQL](#presentation-of
1407	1415	- Data Control Language (authorizations, users),	- Data Control Language (authorizations, users),
1408	1416	- Data Manipulation Language (insert, update and delete).	- Data Manipulation Language (insert, update and delete).
1409	1417
1410		The three last sublanguages being dubbed "Data Manipulation Language".
	1418		<!--
	1419		The three last sublanguages being dubbed "Data Manipulation Language".
	1420		-->
1411	1421
1412	1422	### SQL	### SQL
1413	1423

...	...	Type and domains are two different things in some implementations, cf. for insta
1441	1451	`SQL` _is_ a programming language: it has a strict syntax, sometimes cryptic error messages, it evolves, etc.	`SQL` _is_ a programming language: it has a strict syntax, sometimes cryptic error messages, it evolves, etc.
1442	1452	Some of its salient aspects are:	Some of its salient aspects are:
1443	1453
1444		- `SQL` is "kind of" case-insensitive^[The `SQL` keywords are case-insensitive, but the table and schema names are sometimes case-sensitive, it depends of the actual implementation. For instance, MySQL is completely case-insensitive (reserved words, tables, attributes), MariaDB is not (the case for table names matter).], does not care about spaces and new lines
	1454		- `SQL` is "kind of" case-insensitive^[The `SQL` keywords are case-insensitive, but the table and schema names are sometimes case-sensitive, it depends of the actual implementation. For instance, MySQL is completely case-insensitive (reserved words, tables, attributes), MariaDB is not (the case for table names matter).], does not care about spaces and new lines.
1445	1455	- In-line comments are what is after `--`, multi-line comments uses `/* …*/`.	- In-line comments are what is after `--`, multi-line comments uses `/* …*/`.
1446	1456	- Every statement ends with a `;`.	- Every statement ends with a `;`.
1447	1457	- The exact syntax is left as an exercise in @problem:sqldoc.	- The exact syntax is left as an exercise in @problem:sqldoc.

...	...	For aggregate functions, cf. [@Textbook6, 5.1.7] or [@Textbook7, 7.1.7].
2089	2099	### `AUTO_INCREMENT`	### `AUTO_INCREMENT`
2090	2100
2091	2101	Something that is not exactly a constraint, but that can be used to "qualify" domains, is the `AUTO_INCREMENT` feature of MySQL.	Something that is not exactly a constraint, but that can be used to "qualify" domains, is the `AUTO_INCREMENT` feature of MySQL.
2092		Cf. <https://dev.mysql.com/doc/refman/8.0/en/example-auto-increment.html>, you can have MySQL increment a particular attribute (most probably intended to be your primary key) for you.
	2102		Cf. <https://dev.mysql.com/doc/refman/8.0/en/example-auto-increment.html>, you can have MySQL increment a particular attribute (most probably intended to be your primary key, or some form of counter) for you.
2093	2103
2094	2104	### Transactions	### Transactions
2095	2105

Hints:
Before first commit, do not forget to setup your git environment:

git config --global user.name "your_name_here"
git config --global user.email "your@email_here"

Clone this repository using HTTP(S):

git clone https://rocketgit.com/user/caubert/CSCI_3410

Clone this repository using ssh (do not forget to upload a key first):

git clone ssh://rocketgit@ssh.rocketgit.com/user/caubert/CSCI_3410

Clone this repository using git:

git clone git://git.rocketgit.com/user/caubert/CSCI_3410

You are allowed to anonymously push to this repository.
This means that your pushed commits will automatically be transformed into a merge request:

... clone the repository ...
... make some changes and some commits ...
git push origin main