A data element that uniquely identifies one record from the other in a table is the

Assessment: WAEC SSCE - Data Processing - 2016 (Objective) Subject: Data Processing

Question 1 Report

A data element that uniquely identifies one record from the other in a table is the

Answer Details
The data element that uniquely identifies one record from another in a table is called the primary key. In a database table, a primary key is a column or set of columns that uniquely identifies each row or record in the table. No two records in the table can have the same value for the primary key column or columns. The primary key plays a critical role in database design and data integrity. It ensures that each record in the table is unique and can be identified and retrieved accurately. In addition, it can be used to create relationships between tables, where the primary key of one table is used as a foreign key in another table. For example, in a table of customer information, the primary key may be a unique customer ID number assigned to each customer. This ensures that each customer record is unique and can be easily retrieved or referenced in other tables. In summary, the primary key is a data element that uniquely identifies each record in a table. It is a critical component of database design and ensures data integrity and accuracy.

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