Learn what is the syntax for creating a check constraint in SQL and how to use it to validate your data and enforce data integrity rules on your tables.

Erfahren Sie, wie die Syntax zum Erstellen einer CHECK-Einschränkung in SQL lautet und wie Sie sie verwenden, um Ihre Daten zu überprüfen und Datenintegritätsregeln für Ihre Tabellen zu ...

It uniquely identifies each row in a table -- 4 FOREIGN KEY - Prevents actions that would destroy links between tables -- 5 DEFAULT - Sets a default value for a column if no value is specified -- 6 ...

If not, the statement will fail with a constraint violation. Check constraints are easy to code because they are written using recognizable SQL syntax. The check constraint syntax consists of two ...

* This constraint does not allows the values which are not satisfies the given condition. * We can apply the check constraint on more than one column in the same table.