Snippet

Optimizing Query Performance by Selecting Specific Columns

Avoiding SELECT * and requesting only necessary columns reduces memory usage and network overhead, significantly improving query performance.

snippet.sql

sql

SELECT first_name, email
FROM users
WHERE is_active = 1;

Breakdown

SELECT first_name, email

Retrieves only the required columns instead of fetching all columns with *.

FROM users

Identifies the source table containing the user records.

WHERE is_active = 1;

Filters the records to include only active users.