Query Planning & Statistics (EXPLAIN ANALYZE) Quiz

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🔍 Postgres Database Administration – Query Planning & Statistics (EXPLAIN ANALYZE)

20 questions · 15 min timer · Explanations included · Free

What is the impact of a high 'Rows Removed by Join Filter' count in a query execution plan?

It indicates efficient use of indexes.

It means the query is I/O-bound.

It shows that the query is CPU-bound.

It suggests that the join condition is filtering out many rows, potentially indicating an inefficient join strategy.

None

A high 'Rows Removed by Join Filter' count suggests that many rows are being filtered out by the join condition, which may indicate an inefficient join strategy.

What is the primary purpose of using the EXPLAIN ANALYZE command in PostgreSQL?

To generate a visual representation of the database schema.

To execute a query and provide the execution plan with actual run times.

To optimize the database by automatically creating indexes.

To backup the database schema and data.

None

EXPLAIN ANALYZE is used to execute a query and provide the execution plan along with actual run times, helping in performance tuning.

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