What is the purpose of using a primary key in a database table?
- To sort data in ascending order
- To uniquely identify each row in the table
- To group related data records
- To define data types for columns
A primary key in a database table is used to uniquely identify each row in the table. It ensures that no two rows have the same values for the primary key, making it a crucial concept for data integrity and efficient data retrieval.
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