Learn about the types and uses of SQL constraints in SQL Server databases. Constraints are rules that enforce data integrity and ensure data accuracy and reliability. In this article, I am going to discuss Constraints in SQL Server with examples. The Constraints are used to maintain the data integrity. Constraints in SQL are rules that you can imply on the data in a table to maintain accuracy, integrity, and reliability. Learn all the SQL constraints now! Constraints are used to limit the type of data that can go into a table. This ensures the accuracy and reliability of the data in the table. If there is any violation between the constraint and the data action, the action is aborted. Constraints can be column level or table level.
