SQL Server supports six types of constraints for maintaining data integrity. What are the different types of SQL Server Constraints available? We can create the constraint on single or multiple columns of a table in SQL Server. they are mainly used to maintain data integrity. The SQL Server Constraints are used to restrict the insertion of unwanted data in any columns i.e. The SQL Server Constraints are mainly used to maintain data integrity. We can define the SQL Server Constraint as a property that can be assigned to a column or columns of a table. This is the reason why the end-user can trust the data. To provide data integrity, RDBMS provides us a set of integrity constraints that ensures that the data entered into the database is going to be accurate, consistent, and reliable. What is Data Integrity in SQL Server?ĭata integrity means the data contained in the database is accurate, consistent, and reliable. Note: In the next article, I am going to discuss Primary Key and Foreign Key Constraint.
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