Question

How keys are useful in maintaining database integrity?​

Answer 1

Answer:

A primary key allows each row in a table to be uniquely identified and ensures that no duplicate rows exist. Use the following guidelines when selecting a primary key: Choose a column whose data values are unique. The purpose of a table's primary key is to uniquely identify each row of the table.

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Answer 2

Answer:

A primary key allows Each row in a table to be uniquely identified and ensure that no duplicate rows exist.

Use the following guidelines when selecting a primary key:

Choose a column whose data values are using?

The purpose of a table's primary key is the uniquely identify each row of the table.

Explanation:

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