Facilities provided by a database management system to ensure consistency within the data.

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SQL - referential integrity - Foreign key and Check constraint

Please let me know if below two declarations are same. create table R1 ( a INT PRIMARY KEY, b INT references K(w)); Note: K is a table with single attribute w as primary key create table R1 ( a ...
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Maintaining Referential Integrity with a Filestream enabled database

We have a production database which is filestream enabled and has grown, within a year, to about 20Gb as it stores documents. On many occasions we need to bring the live data back to UAT or Dev ...
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Enforce referential integrity for FriendRequest table that has UserA and UserB

I have a table called User that has UserName as a primary key. I want to establish a relationship with enforced referential integrity between User and FriendRequest. FriendRequest has the following: ...
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insert record to child table which doesn't map to parent table - possible?

Actually I've 2 relevant questions: insert record to child table which doesn't map to parent table - possible? ON DELETE NO ACTION - when a record in parent table is deleted, it should affect ...