I\'ve installed mysql in my ubuntuusing the classic command: apt-get install mysql-server And to my surprise it is a mysql which doesnt respect any constraint i write with \"check\".
I\'m using Oracle 11g, and trying to 开发者_JAVA技巧create a table define constraints on the creation.
2nd Edit: The source code for the involved function is as follows: ALTER FUNCTION [Fileserver].[fn_CheckSingleFileSource] ( @fileId INT )
Imagine that I have a table with integer columns Col1, Col2, Col3, Col4.Each column is nullable and a valid row must contain a value in exactly 1 columns (i.e. all nulls is invalid and more than 1 col
I know that SQL constraints can force data to meet validity criteria. However, what about criteria such as \"Student\'s grade can only be updated when the \'finalised\' flag is false\"? Do such update
I have a table that is partitioned by month and is used for holding apache log information.When I run EXPLAIN for a simple query which has a WHERE clause on the same field as the partition CHECKs, I g
The majority of开发者_如何学C my integration tests use spring\'s AbstractTransactionalSpringContextTests to do a rollback instead of commiting to the database.This works well normally but because fore
What SQL databases, if any, support subqueries in CHECK constraints? At present and as far as I know, Oracle, MySQL, and PostgreSQL do not.
I need to define an XOR constraint on an entity using JPA i.e. a constraint that specifies that you can have a value in either column A or column B but not both (but at least one of them). It seems to
This question already has an开发者_运维知识库swers here: CHECK constraint in MySQL is not working
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