Question

write the uses of primary key​

Answer 1

Answer:

here is your answer.

A primary key is used to ensure data in the specific column is unique.

You can only set constraints with primary keys, by setting a foreign key to another column which creates a relationship with the column that has the primary key set.

A prime use of a primary key is in the case of a users table.

Answer 2

Some uses of the primary key are given below.

Explanation:

• A primary key is being used to verify identity data or information is present in the given section.
• Just by adding a foreign key to some other column or section that establishes a partnership with either the column that will have the set of the primary key, could you set restrictions through primary keys.
• Throughout the context of a consumer list, a primary key seems to be a preferred usage.

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