The SQL check constraint used for an identification number ensures that the value entered for the identification number is of a specific length and format. For example, if the identification number is a social security number (SSN), the check constraint would verify that the value entered is nine digits long and in the format of XXX-XX-XXXX. If the value does not meet these requirements, the check constraint will prevent the data from being inserted or updated in the table.
Asked: 2023-07-11 02:27:32 +0000
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Last updated: Jul 11 '23