Constraints in sql are used to define rules for the table and columns in a database and also make sure that data are accurate and trusted in the database. constraints are responsible for the ...

A "CHECK constraint" in SQL is a database constraint that enforces a specific condition on data within a table, ensuring that only values meeting that condition can be inserted or updated, thereby ...

CONSTRAINT clause (Microsoft Access SQL) Applies to: Access 2013, Office 2013 A constraint is similar to an index, although it can also be used to establish a relationship with another table. You use ...

I've got an interesting constraint I'm trying to add to our database. I can do with with triggers, but am curious if there is a more elegant way to do this in T-SQL (SQL2005, FWIW) We have two ...