SQL Constraints are rules used to limit a type of data that can go into the table, to maintain the accuracy and integrity of data inside the table. Constraints can be divided into the following two types,

1. Column level constraints: Limits only the column data.
2. Table-level constraints: Limits whole table data.

SQL Constraints

Constraints are the set of rules enforced on the data columns of the table. These are used to limit the type of data that can go into the table. It ensures the accuracy, integrity, and reliability of the data in the SQL database.

Constraints in SQL are used to make sure that the integrity of the data is maintained in the database.

#sql #sql constraints