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Check « Constraints « SQL Server / T-SQL Tutorial
SQL Server / T-SQL Tutorial
Constraints
Check
7.5.Check
7.5.1.
Using CHECK Constraints
7.5.2.
Adding a CHECK Constraint to an Existing Table
7.5.3.
Constraints with name
7.5.4.
CHECK Clause
7.5.5.
Check Constraint
7.5.6.
CHECK (DATEPART(DAY, GETDATE()) < 28)
7.5.7.
A check constraint uses an expression to qualify records that are acceptable for any Inserts or Updates
7.5.8.
Use or to link two conditions for check constraint
7.5.9.
Using a Multicolumn CHECK Constraint
7.5.10.
Check for data length
7.5.11.
Pattern based constraint
7.5.12.
Mark nocheck for a constraint
7.5.13.
A table-level check constraint that limits Banker IDs to a specific format