What is the purpose of the WHERE clause in SQL?

Parthiban Kannan

Updated on January 8, 2026

< 1 min read

The WHERE clause is used to filter rows based on specific conditions.
It ensures only relevant data is retrieved from the table.
This reduces data volume and improves query performance.
In my project, we used WHERE to extract only active customers.
It also helped filter data by date range for incremental loads.
Multiple conditions can be applied using AND or OR.
Without WHERE, queries would return unnecessary data.