Q:
What is Primary Key in DBMS?
Answer
A primary key is a special relational database table column or combination of columns designated to uniquely identify all table records. That is, A primary key is a column or set of columns in a table that uniquely identifies tuples (rows) in that table.
A primary key, also called a Primary Keyword.
Main Features Primary key are ::
It must contain a unique value for each row of data.
It cannot contain null values.
View answer
Workspace
Report Error
Discuss