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 solution to first problem of Exam 2. 45881a9b8ab1e5a0071b58d72362059593365d52 aubert@math.cnrs.fr 2019-04-03 18:38:48
Quick note in Java programming. 625282d4fece1f6a7a617a8c9bcf7c3c856185b3 aubert@math.cnrs.fr 2019-04-02 18:42:48
Added exam #2 0aa6788451b34cb6371fed5a0f719a4ac52cf0c8 aubert@math.cnrs.fr 2019-04-01 18:37:43
Fixing a typo. 502262b742ac86d7b3d5e95a0f9fcd7ca3a6e586 aubert@math.cnrs.fr 2019-03-22 17:35:43
Forgot one figure. 1212e57a5f2e7b2f104f432feb4dce0669cdb452 aubert@math.cnrs.fr 2019-03-22 17:32:36
Working on Ch. 4, adding the content of the weekly announcements to the core of the document, added illustrations on the conversion E.R. -> Rel. model, fixed various typos. 1995837f41c1508ae809d5a91065bdefd5bd6c03 aubert@math.cnrs.fr 2019-03-22 17:27:51
Fixing exercise and normalization in Chapter 4. 7aa4b9a581daf7144dd485ba791b7707585088b8 aubert@math.cnrs.fr 2019-03-20 18:55:42
Quick fix on UML diagrams. 86a52b2f6ce92750bdb2c33eaa4dbc4497322e1c aubert@math.cnrs.fr 2019-03-18 18:37:24
Adding some missing files. 0c090f6d43e84b71ca5e1f6d3e8d1aa0d733824d aubert@math.cnrs.fr 2019-03-18 18:28:32
Fixing the style for line numbers, adding information for weak entities, drawing some figures (for crow's notation, for alternative notations), removing various images. 26ce9a96701649988cfdfcb3e61011f4e154896d aubert@math.cnrs.fr 2019-03-18 18:25:09
Added solution to quiz #4. db0de8ba5c6605d77fdbc076f3a9e5b3851d83e0 aubert@math.cnrs.fr 2019-03-15 20:57:13
Added questions for Quiz #4. 30d908601e9431ec0901d4001ddbf99bf14f75d0 aubert@math.cnrs.fr 2019-03-15 17:52:24
Worked on narrative in Chapter 4, mostly ER diagrams. 9e0cc5fc5a2b4087fe1191f1ba5926f87ad5a7bd aubert@math.cnrs.fr 2019-03-12 18:57:16
Updated list of known bugs. d51ff0a5bb73f09eb8d3eb7520ebb77555911e69 aubert@math.cnrs.fr 2019-03-12 17:09:22
Updating the README with the list of new files. bb35e21746d958d649b226a5857150d975d85403 aubert@math.cnrs.fr 2019-03-07 15:20:04
Adding a list of bug, and the sketch of a guide to contribute. 3a94b1fa49aee97001a45325f3f10f09475bf388 aubert@math.cnrs.fr 2019-03-07 15:14:38
Fixed the size of the images, added mention of the support of Affordable Learning Georgia. 485cf486d8d2b08427e5d02eda56d5b7a9495b38 aubert@math.cnrs.fr 2019-03-05 19:37:39
Finishing homework #5. e322bc945941083b0649557d9ad6bdbb8308c10c aubert@math.cnrs.fr 2019-03-04 15:10:15
Preparing homework 5 2b9ba64d1d36ae9f413929947cac5e6cddceb3dc aubert@math.cnrs.fr 2019-03-01 20:06:12
Some fixes and added quiz #3. d73c356f1bec9679f7123bc508c1863f8de40aef aubert@math.cnrs.fr 2019-02-28 20:34:04
Commit 45881a9b8ab1e5a0071b58d72362059593365d52 - Added solution to first problem of Exam 2.
Author: aubert@math.cnrs.fr
Author date (UTC): 2019-04-03 18:38
Committer name: aubert@math.cnrs.fr
Committer date (UTC): 2019-04-03 18:38
Parent(s): 625282d4fece1f6a7a617a8c9bcf7c3c856185b3
Signer:
Signing key:
Signing status: N
Tree: c439aba102489066caef824c0160c543c852164e
File Lines added Lines deleted
notes/fig/er/Job.tex 64 0
notes/lectures_notes.md 6 3
File notes/fig/er/Job.tex added (mode: 100644) (index 0000000..45ae464)
1 \documentclass[border=20pt]{standalone}
2 \input{template.def}
3
4 \begin{tikzpicture}[node distance=1.5cm]
5 \node[entity] (COMPANY) {COMPANY};
6 \node[attribute] [above of=COMPANY] {\key{Name}} edge (COMPANY);
7 \node[attribute] (Address) [right = .5cm of COMPANY] {Address} edge (COMPANY);
8 \node[attribute] [right = .5cm of Address] {Physical} edge (Address);
9 \node[attribute] [below right = .5cm of Address] {Numerical} edge (Address);
10 \node[multi attribute] [above right = .5cm of COMPANY] {Benefits} edge (COMPANY);
11 %
12 \node[relationship] (ADVERTISEDBY) [left = 1.5cm of COMPANY] {ADVERTISED\_BY} edge node[above, pos=0.4] {$\c1$} (COMPANY);
13 \node[attribute] [above = .3cm of ADVERTISEDBY] {URL} edge (ADVERTISEDBY);
14 %
15 \node[entity] (JOBAD) [left = 1.5cm of ADVERTISEDBY] {JOB\_AD} edge[total] node[above, pos=0.6]{$\cM$} (ADVERTISEDBY);
16 \node[attribute] [above left of = JOBAD] {Title} edge (JOBAD);
17 \node[attribute] [left = .5cm of JOBAD] {Salary Range} edge (JOBAD);
18 \node[multi attribute] [below left = .5cm of JOBAD] {Requirement} edge (JOBAD);
19 \node[attribute] [above right of = JOBAD] {\key{id}} edge (JOBAD);
20 %
21 \node[relationship] (EMPLOYS) [below =0.8cm of COMPANY] {EMPLOYS} edge node[right, pos=0.4] {$\cN$} (COMPANY);
22 %
23 \node[entity] (CONTACT) [below left = 3cm and 2cm of COMPANY] {CONTACT} edge node[above, pos=0.4] {$\cM$} (EMPLOYS);
24 \node[attribute] [right = .5cm of CONTACT] {Name} edge (CONTACT);
25 \node[attribute] [below right = .5cm and .2cm of CONTACT] {\key{Id}} edge (CONTACT);
26 \node[attribute] [below = .5cm of CONTACT] {Role} edge (CONTACT);
27 %
28 \node[relationship] (DISCUSSED) [below right = 0.8cm and 1cm of JOBAD] {DISCUSSED\_BY} edge node[right, pos=0.4] {$\cN$} (CONTACT) edge node[above, pos=0.4] {$\cM$} (JOBAD);
29 % \node[relationship] (REPAIREDBY) [below right =3cm of JOBAD] {REPAIRED\_BY} edge node[below, pos=0.6] {$\cM$} (JOBAD) edge node[below, pos=0.6] {$1$} (CONTACT);
30 %
31
32 \node[weak entity] (OFFER) [below = 5cm of JOBAD] {OFFER};
33
34 \node[attribute] [left = 0.5cm of OFFER] {Salary Offered} edge (OFFER);
35 \node[attribute] [below left = 0.5cm of OFFER] {Start Date} edge (OFFER);
36
37 \node[ident relationship] (RESULTEDIN) [below = 1 cm of JOBAD] {RESULTED\_IN} edge node[right, pos=0.4] {$1$} (JOBAD) edge[total] node[left]{$1$} (OFFER);
38
39 \node[attribute] [below of = OFFER] {\pkey{Date}} edge (OFFER);
40
41 %\node[entity] (COMPANY) {COMPANY};
42 %
43 %
44 %
45 %\node[relationship] (SPEAKS) [below right of=COMPANY] {SPEAKS} edge node[right, pos=0.4] {$M$} (COMPANY);
46 %\node[entity] (LANGUAGE) [below right of=SPEAKS] {LANGUAGE} edge node[right, pos=0.5] {$N$} (SPEAKS);
47 %\node[attribute] (code) [left of = LANGUAGE] {\key{Code}} edge (LANGUAGE);
48 %\node[attribute] (symbol) [right of = LANGUAGE] {Name} edge (LANGUAGE);
49 %
50 %\node[relationship] (BWF) [below of = LANGUAGE] {B\_W\_F};
51 %\draw (LANGUAGE) to node[left, pos=0.6] {$N$} (BWF.west);
52 %\draw (LANGUAGE) to node[right, pos=0.6] {$M$} (BWF.east);
53 %
54 %
55 %\node[multi attribute] (color) [right =1cm of anthem] {Creator} edge (anthem);
56
57 %
58 %\node[relationship] (WIN) [above right of =LANGUAGE] {W\_IN};
59 %\draw (LANGUAGE) to node[left, pos=0.6] {$N$} (WIN);
60 %\draw (anthem) to node[right, pos=0.6] {$M$} (WIN);
61
62 \end{tikzpicture}
63
64 \end{document}
File notes/lectures_notes.md changed (mode: 100644) (index 6246f1b..5806c4f)
... ... Solution to [%D %n (%T)](#problem:car-insurance)
5620 5620
5621 5621 --- ---
5622 5622
5623 <!--
5624 5623 Solution to [%D %n (%T)](#problem:job-offers) Solution to [%D %n (%T)](#problem:job-offers)
5625 5624 ~ ~
5626 5625
5627 To be written.
5626 A possible solution is:
5628 5627
5628 ![](fig/er/Job)
5629 \
5630
5631 Note that CONTACT could be a weak entity, with the identifying relationship being either DISCUSSED_BY or EMPLOYS, but both have disadvantages, since they would disallow a CONTACT to discuss more than one offer, or to be hired by more than one company.
5632
5629 5633 --- ---
5630 -->
5631 5634
5632 5635 Solution to [%D %n (%T)](#problem:ERtoRELBike) Solution to [%D %n (%T)](#problem:ERtoRELBike)
5633 5636 ~ ~
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