Question

What is the Importance of primary key in a table? Can you have multiple primary keys in a table?why or why not?

Answer 1

no we cannot have multiple primary key in a table

Answer 2

A key which is named as primary key in a table [generally in RDBMSs (Relational Database Management Systems)] is a field which is used mainly for identification purposes.

A primary key is a field which is unique for every record. In database terminology, the rows are also called as records and the columns are also called fields.

No. You cannot have multiple primary keys in a table. The reason is that only one field can be used as a unique identification feature for every record.