PostgreSQL Query Optimizer

Analyze and optimize your SQL queries for PostgreSQL performance.

SQL Query Input

Estimated Query Cost (Simulated)

Ready

Waiting for input... Enter a SQL query and click Analyze to see optimization suggestions.

Check for SELECT *

Flag usage of wildcard column selection.

Leading Wildcards

Flag LIKE '%value' patterns (bypasses indexes).

Inefficient Subqueries

Check for IN (SELECT...) vs EXISTS.

ORDER BY RANDOM()

Warn about performance impact on large tables.

Functions on Indexed Columns

Flag usage like WHERE YEAR(date) = 2023.