What is the primary reason to run EXPLAIN (or EXPLAIN ANALYZE) on a query?

Problem Statement

Explanation

EXPLAIN shows how the optimizer intends to execute your SQL: join order, access paths, estimated rows, and operator costs. With ANALYZE, you also see actual rows and timing. You use this to spot scans where seeks are expected, poor join choices, and misestimates that hint at stale statistics or non-SARGable predicates.

Code Solution

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EXPLAIN ANALYZE
SELECT o.id, c.name
FROM orders o JOIN customers c ON c.id=o.customer_id
WHERE o.created_at >= CURRENT_DATE - INTERVAL '30 days';

Practice Sets

This question appears in the following practice sets:

Query Optimization & Execution Plans

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What is the primary reason to run EXPLAIN (or EXPLAIN ANALYZE) on a query?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

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Master Interviews Anywhere, Anytime

What is the primary reason to run EXPLAIN (or EXPLAIN ANALYZE) on a query?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime