Check Constraint in SQL | Default Constraint in SQL
In this tutorial, we will learn about what are constraints and why do we need them for our databases. When we try to understand more about the constraints we see that they are just...
SQL add constraint
SQL Constraint Types, Syntax and Examples
We have large collections of data in our databases, and to maintain the correctness of the data, we require logical checks on the data. In SQL, we have constraints as the logical checks for...
