A contrived example: Say we have two types of tools: hammers and wrenches. We have a list of work orders, and we want to track what tool was used for the hammering and what was used for the ...

Check constraints are a powerful feature of SQL that allow you to enforce data integrity rules on your tables. They can help you prevent invalid or inconsistent data from entering your database ...

CONSTRAINTS IN SQL TABLE. Blame. ... ALTER TABLE constraints --To create a UNIQUE constraint on the "ID" column when the table is already created. ADD UNIQUE (sex); DESC ... -- EXAMPLES. CREATE TABLE ...

If ON is specified when a clustered index is added for a PRIMARY KEY or UNIQUE constraint, the whole table is moved to the specified filegroup when the clustered index is created. In this context, ...

Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is ...