what is the role of a primary key in a database
Answers
Answered by
3
Answer:
Explanation:
A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. ... It must contain a unique value for each row of data. It cannot contain null values.
Answered by
0
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.
Similar questions