[Solved] What key information does the EXPLAIN command provide about a PostgreSQL query? — Ans: The execution plan showing how the query will be processed | PostgreSQL

PostgreSQL - Performance Tuning

What key information does the EXPLAIN command provide about a PostgreSQL query?

AThe execution plan showing how the query will be processed

BThe exact number of rows returned by the query

CThe syntax errors in the query

DThe list of tables involved in the database

Step-by-Step Solution

Solution:

Step 1: Understand EXPLAIN's purpose
The EXPLAIN command shows the execution plan, detailing how PostgreSQL intends to execute the query.
Step 2: Differentiate from other outputs
It does not show actual row counts or syntax errors, only the plan.
Final Answer:
The execution plan showing how the query will be processed -> Option A
Quick Check:
EXPLAIN outputs the query plan [OK]

Quick Trick: EXPLAIN shows query execution plan, not results [OK]

Common Mistakes:

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What key information does the EXPLAIN command provide about a PostgreSQL query?