Table constraints are rules applied to table columns.
These rules control what type of data can be inserted into a table.
Constraints help maintain data accuracy and consistency.
Constraints prevent invalid data from being stored.
They ensure that important fields are not left empty.
This improves reliability of the database.
Common constraints include NOT NULL, UNIQUE, and DEFAULT.
These constraints are defined while creating a table.
They automatically enforce data rules.
Constraints reduce errors during data insertion.
They help databases protect important information.
Using constraints is a best practice in database design.
Proper use of constraints makes databases secure and reliable.
Most real-world applications rely heavily on constraints.
Understanding constraints is essential for backend developers.