caubert / CSCI_3410 (public) (License: CC BY 4.0) (since 2018-05-16) (hash sha1)
Material for Database Class.
Clone URLs: https://rocketgit.com/user/caubert/CSCI_3410 ssh://rocketgit@ssh.rocketgit.com/user/caubert/CSCI_3410 git://git.rocketgit.com/user/caubert/CSCI_3410
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List of commits:
Subject Hash Author Date (UTC)
Added example about self-referencing tuple. 0392e724d84f2a9264fec4be188fa74ef795266a caubert 2021-08-30 18:56:34
Clarified what a mini-world is. 7bc9938cbdcc8be11cd61c74899b330d626ec2b5 caubert 2021-08-25 16:23:12
Added emoji support and cleaned. f7b577db596410737f72c93fbcab615b53226ac5 aubert@math.cnrs.fr 2021-08-17 13:35:36
Finished final from previous semester. 7622ebd223bbbabaed014a175a0be5da7aff5d6f caubert 2021-08-13 17:05:28
Added final for Spring 2021. 6a4a0d94151df7ab940c814637be8ee5136de850 caubert 2021-08-13 16:55:09
Typo f1acfa7bcd31233571e74e176ee2a38880c08d72 caubert 2021-05-07 02:55:17
Added second problem of final. 38c448de2d0e38bf50efcf1b1da3e0a45def1707 caubert 2021-05-07 01:42:05
Added first exercise of final. df858593f1d47ff3442bcb6216b90605d81e0e1c caubert 2021-05-06 22:26:09
Fixed mongo db and added quiz 4$ 7f0f4b98f4b293927185ed3cb080554eb3af867c caubert 2021-04-23 19:15:53
Finishing with Exam 2 4e0eb343744b5f39ac32145ca7dc61a26b3f48ee caubert 2021-04-09 20:33:48
Added problem and solution of second exam 2b344a25e84c7ebc827c1503151981380ec08f31 caubert 2021-04-07 18:08:08
Worked on exam 2 649fce8b5cbc3f5a98ae905ae8cc56d8baa5df99 caubert 2021-04-06 19:18:54
Clarification on sql injection. f9450ef20ef15cc048c1c2775cbf5e29c4be7255 caubert 2021-03-31 14:56:56
Added an example of batch processing of prepared statement. f83adc39b5066412fa78fdc0aeccb51ccdba908a caubert 2021-03-31 13:39:52
Added an example of batch processing of prepared statement. c206f2899162396a7f391728db8be23031253454 caubert 2021-03-31 13:38:48
Fixed pb (CONSULTATION relation: justification, primary key and normal form) 14aef6161421064f879c5fe803abb4836eebba0a caubert 2021-03-25 20:58:59
Fixed pb (CONSULTATION relation: justification, primary key and normal form) be645c3e4215fd02ed089b843582d8c870525366 caubert 2021-03-25 20:55:34
Fixes in the DB app chapter. 50082333323792958b213f9b0e5e7dc3a2ed47c5 caubert 2021-03-24 18:46:24
Fixed some include code. 9caf6bc12caded947f222cb03fa0c1b10f2c8041 caubert 2021-03-24 13:11:20
Added question from quiz #3 7426197119517bff992e7753174de82ae3ff7ed7 caubert 2021-03-22 16:37:09
Commit 0392e724d84f2a9264fec4be188fa74ef795266a - Added example about self-referencing tuple.
Author: caubert
Author date (UTC): 2021-08-30 18:56
Committer name: caubert
Committer date (UTC): 2021-08-30 18:56
Parent(s): 7bc9938cbdcc8be11cd61c74899b330d626ec2b5
Signer:
Signing key: 9406C0CE110CFCB0
Signing status: E
Tree: f619496c727c4abe89e66415d2cf1ec7d827d7c8
File Lines added Lines deleted
notes/code/sql/HW_FK_Self_Reference.sql 15 0
notes/code/sql/HW_FKtest.sql 0 2
notes/lectures_notes.md 9 0
File notes/code/sql/HW_FK_Self_Reference.sql added (mode: 100644) (index 0000000..392fbac)
1 /* code/sql/HW_FK_Self_Reference.sql */
2
3 DROP SCHEMA IF EXISTS HW_FK_Self_Reference;
4 CREATE SCHEMA HW_FK_Self_Reference;
5 USE HW_FK_Self_Reference;
6
7 -- start snippet demo
8 CREATE TABLE TEST (
9 ID Int PRIMARY KEY,
10 Reference INT,
11 FOREIGN KEY (Reference) REFERENCES TEST (ID)
12 );
13
14 INSERT INTO TEST VALUES (1, 1);
15 -- end snippet demo
File notes/code/sql/HW_FKtest.sql changed (mode: 100644) (index 1364384..96d4268)
1 1 /* code/sql/HW_FKtest.sql */ /* code/sql/HW_FKtest.sql */
2 2 DROP SCHEMA IF EXISTS HW_FKtest; DROP SCHEMA IF EXISTS HW_FKtest;
3
4 3 CREATE SCHEMA HW_FKtest; CREATE SCHEMA HW_FKtest;
5
6 4 USE HW_FKtest; USE HW_FKtest;
7 5
8 6 CREATE TABLE TARGET ( CREATE TABLE TARGET (
File notes/lectures_notes.md changed (mode: 100644) (index c769348..04e6b96)
... ... DEPARTMENT(Code (PK), Name, Head (FK to PROF.Login))
2082 2082 ](fig/rel_mod/professor_department) ](fig/rel_mod/professor_department)
2083 2083 \ \
2084 2084
2085 Then note that we cannot create both tables as pictured directly, as PROF requires DEPARTMENT to exist, to have a foreign key referencing it, and similarly for DEPARTMENT: it is an egg and chicken situation!
2086 Hence, we have to first create a table without the foreign key, and then add it later on, as described below:
2087
2085 2088
2086 2089 ```{.sqlmysql .numberLines .includeLink include=code/sql/HW_ProfExample.sql snippet=tables-1} ```{.sqlmysql .numberLines .includeLink include=code/sql/HW_ProfExample.sql snippet=tables-1}
2087 2090 ``` ```
 
... ... Note the structure of the `ALTER TABLE` command:
2095 2098 ```{.sqlmysql .numberLines .includeLink include=code/sql/HW_ProfExample.sql snippet=tables-2} ```{.sqlmysql .numberLines .includeLink include=code/sql/HW_ProfExample.sql snippet=tables-2}
2096 2099 ``` ```
2097 2100
2101 On a side note, note that we do not have the same difficulty when inserting a value in a table that contains a foreign key referencing itself: it is accepted to insert a value that is referencing itself, as illustrated below.
2102
2103 ```{.sqlmysql .numberLines .includeLink include=code/sql/HW_FK_Self_Reference.sql snippet=demo}
2104 ```
2105
2106
2098 2107 #### Populating #### Populating
2099 2108
2100 2109 We can insert multiple values at once: We can insert multiple values at once:
Hints:
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git config --global user.name "your_name_here"
git config --global user.email "your@email_here"

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