What is primary key class 8 short answer?

Question

Answer: Primary key is a field that uniquely identifies each record in a table. For example, in a school database, the Roll Number of each student uniquely identifies each student. A Primary key does not allow Null Values and must always have a unique value. 7 нояб. 2020 г.

What is primary key short answer?

A primary key is the column or columns that contain values that uniquely identify each row in a table. A database table must have a primary key for Optim to insert, update, restore, or delete data from a database table.

What is primary key class?

A primary key class must meet these requirements: The access control modifier of the class must be public. The properties of the primary key class must be public or protected if property-based access is used. The class must have a public default constructor.

What is primary key in Brainly?

Brainly User. Answer: A primary key is a field in a table which uniquely identifies each row/record in a database table. Primary keys must contain unique values.

Why do we need a primary key short answer?

Explanation: 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.

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