Check Constraint
This Constraint limits the values accepted by a column every time a row of data is updated or inserted into a table. For instance a User table may have a Check Constraint on the Age column to make sure it's value is 18 or greater.
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This Constraint limits the values accepted by a column every time a row of data is updated or inserted into a table. For instance a User table may have a Check Constraint on the Age column to make sure it's value is 18 or greater.