Explain Constraints in SQL?

1.	Explain Constraints in SQL?
Answer» It is a rule USED to limit the TYPE of data that can insert into a table, to MAINTAIN the integrity and accuracy of the data inside the table. It can be divided into two types. Column level constraints Table-level constraints These are the most common constraints that can be APPLIED to a table. NOT NULL DEFAULT UNIQUE PRIMARY KEY FOREIGN KEY ETC

Answer»

It is a rule USED to limit the TYPE of data that can insert into a table, to MAINTAIN the integrity and accuracy of the data inside the table.

It can be divided into two types.

These are the most common constraints that can be APPLIED to a table.

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