My guess would be that a foreign key reference is set to RESTRICT by default. But, is there any stan开发者_JAVA技巧dard for this? Is the default equal on any database type? Or should these values be d
I have the following table setup. Bag +-> BagID (Guid) +-> BagNumber (Int) BagCommentRelation +-> BagID (Int)
Is there a easy way to query a table for its constraints(foreig开发者_高级运维nkeys specificaly)
Here is my problem - I have 2 tables: WORKER, with columns |ID|OTHER_STAF| , where ID is primar开发者_开发问答y key
I have a relatively simple subset of tables in my database for tracking something called sessions. These are academic sessions (think offerings of a particular program). The tables to represent a sess
I have been working on it for quite a while, but still can\'t figure out what\'s wrong with my code. Each Service has multiple profiles, but each profile only has one Service.
I know that in MySQL, UNIQUE constraits don\'t treat NULL values as equal.So if I have a unique constraint on ColumnX, then two separate rows 开发者_开发知识库can have values of NULL for ColumnX and t
I\'m using phpmyadmin (php & mysql) and I\'m having a lot of trouble linking t开发者_C百科he tables using foreign keys.
What is the best way of handling many-to-many relations in a RDBMS database like mySQL? Have tried using a pivot table to keep track of the relationships, but it leads to either one of the following:
If a django model contains a foreign key field, and if that field is shown in list mode, then it shows up as text, instead of displaying a link to the foreign object.
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