In a relational database, what is the purpose of the PRIMARY KEY constraint?radio_button_uncheckedIt ensures uniqueness and identifies each record in a table.radio_button_uncheckedIt defines a field's data type.radio_button_uncheckedIt specifies the table relationships.radio_button_uncheckedIt restricts access to sensitive data.

What is the primary key in a relational database used for?

Which constraint must a primary key adhere to

What is the primary key used for in a relational database?Select one:a. To link tables togetherb. To perform data aggregationc. To enforce referential integrityd. To uniquely identify each record in a table

What is the primary key in a relational database used for?To establish relationships between tablesTo ensure data is stored in binary formatTo uniquely identify records in a tableTo create backup copies of the database

Which of the following is not Constraint in SQL?Primary KeyNot NullCheckUnion