[Solved] Which of the following is a reason to use CTEs instead of subqueries in PostgreSQL? — Ans: CTEs can be referenced multiple times within the same query | PostgreSQL

PostgreSQL - Common Table Expressions

Which of the following is a reason to use CTEs instead of subqueries in PostgreSQL?

ACTEs automatically optimize the query plan better than subqueries

BCTEs replace the need for joins

CCTEs store data permanently in the database

DCTEs can be referenced multiple times within the same query

Step-by-Step Solution

Solution:

Step 1: Identify CTE features related to query reuse
CTEs can be named and referenced multiple times in a query, avoiding repetition of the same subquery.
Step 2: Check other options for accuracy
CTEs do not guarantee better optimization, do not store data permanently, and do not replace joins.
Final Answer:
CTEs can be referenced multiple times within the same query -> Option D
Quick Check:
CTEs reusable in query = B [OK]

Quick Trick: CTEs can be reused multiple times in one query [OK]

Common Mistakes:

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Which of the following is a reason to use CTEs instead of subqueries in PostgreSQL?