Constraints in SQL are used to define rules for the table and columns in a database and also make sure that data are accurate and trusted in the database. Constraints are responsible for the ...

A check constraint ... level and reduce the need for additional checks and transactions. Check constraints in SQL help keep data accurate by allowing only the right kind of information in a column.

Examples include triggers and referential integrity, as well as the primary topic of this month’s column ... will fail with a constraint violation. Check constraints are easy to code because they are ...

Constraints that applied to column are called column level constraints whereas constraints that ... If no other value is given than default value is apply to all the record by using Default constraint ...