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Default Constraint Yes, the default is a type of constraint, although it does not really enforce anything. Default constraints apply a value to a column when an INSERT statement does not specify the value for the column. Although default constraints do not enforce a rule like the other constraints we have seen, they do provide the proper values to keep domain integrity in tact. A default can assign a constant value, the value of a system function, or NULL to a column. You can use a default on any column except IDENTITY columns and columns of type timestamp. Prajakta Pandit 03-8-2017 02:11 AM

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