What does the EXPLAIN command in PostgreSQL primarily show?

easy📝 Conceptual Q11 of 15

PostgreSQL - Performance Tuning

What does the EXPLAIN command in PostgreSQL primarily show?

AHow PostgreSQL plans to execute a query

BThe exact data returned by the query

CThe syntax errors in the query

DThe database schema structure

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of EXPLAIN
EXPLAIN shows the query plan, which is how PostgreSQL intends to run the query.
Step 2: Differentiate from other commands
It does not show actual data or errors, only the plan.
Final Answer:
How PostgreSQL plans to execute a query -> Option A
Quick Check:
EXPLAIN = query plan [OK]

Quick Trick: EXPLAIN = query plan, not data or errors [OK]

Common Mistakes:

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