Question

explain in brief:constraints in sql​

Answer 1

Answer:

SQL constraints are used to specify rules for the data in a table. Constraints are used to limit the type of data that can go into a table. This ensures the accuracy and reliability of the data in the table. If there is any violation between the constraint and the data action, the action is aborted.

Explanation:

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Answer 2

Not null

Default

Unique

Check

Are some constraints in SQL

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