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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.
Check constraints are easy to code because they are written using recognizable SQL syntax. The check constraint syntax consists of two components: a constraint name and a check condition.
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 ...
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