Categories

JavaScriptPHPHTMLCssPythonWordPressWeb developmentLinuxMySQLAndroidWindowsJavaC++ / C#LayoutReactUbuntuYiiDjangoProgramming1C-BitrixLaravelSystem administrationTelegramJSONDebianPostgreSQLIOSGoogleHtaccessWindows ServerGitMacOSGoogle ChromeCMSWooСommerceBootstrapNginxSQLUnityAPI
Make a leaderReport
T
T
tj572017-10-23 15:10:23
Database
tj57, 2017-10-23 15:10:23

What does i:r, d:r, etc. mean? in ER-diagrams in a DB?

59eddc073f5aa589283474.jpeg

Reply
Answer the question

Answer the question

In order to leave comments, you need to log in

1 answer(s)
Report
K
kn0ckn0ck, 2017-10-23
@kn0ckn0ck

If the phrase "referential integrity rules" does not cause rejection, then they are :)
D:R - delete restricted
U:R - update restricted
and so on.

Similar questions
O
Optimus2014-09-02 20:32:42
How do you like comments? 2Reply
T
tempick2020-11-13 19:55:07
Where and how to store trees? 1Reply
P
Pavel Krasnov2016-09-16 14:21:17
Besides Java, what do you need for Android? 4Reply
D
Dreadd2014-09-10 15:07:28
Where can I find a flexible, customizable client frontend for SQL Database? 1Reply
A
Andrey Ivchenkov2016-09-19 15:50:52
Is it possible to set up replication with different MySQL versions (5.5 -> 5.7)? 1Reply

Didn't find what you were looking for?

Ask your question

Ask a Question

731 491 924 answers to any question