While check constraints in SQL are very useful, they also have some limitations that you should be aware of. First, check constraints are not enforced on existing data when you create them, unless ...

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, ...

SqlPackage cookbook Fixing dropped and recreated CHECK constraints This happens because the definition of the constraint - as stored by SQL Server - varies from the way you've expressed that ...