Check « Constraints « SQL Server / T-SQL Tutorial

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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
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