When I am working with an Oracle database, I still find myself using SQL*Plus for many quick and dirty database queries. In particular, I often look up constraints in SQL*Plus. In this post, I ...

The CHECK constraint limits the value range that can be placed in a column. It ensures only specific values are accepted either on a single column or based on conditions across multiple columns ...

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 ...

Check constraints are supported in all of the major DBMS products, including DB2, Oracle, and SQL Server. But they are too-often ignored and not implemented in production databases. Properly defined, ...

SQL Error: ORA-02290: check constraint (OT.CHECK_POSITIVE_BUY_PRICE) violated Add Check constraint to a table ALTER TABLE table_name ADD CONSTRAINT check_constraint_name CHECK(expression); ...