[Solved] Which of the following is a key advantage of using CTEs in SQL queries? — Ans: They allow recursive queries for hierarchical data | SQL

SQL - Common Table Expressions (CTEs)

Which of the following is a key advantage of using CTEs in SQL queries?

AThey replace the need for joins in queries

BThey automatically optimize query execution plans

CThey allow recursive queries for hierarchical data

DThey permanently store data in the database

Step-by-Step Solution

Solution:

Step 1: Identify special features of CTEs
CTEs support recursion, which is useful for querying hierarchical or tree-structured data.
Step 2: Eliminate incorrect options
CTEs do not permanently store data, nor do they replace joins or automatically optimize queries.
Final Answer:
They allow recursive queries for hierarchical data -> Option C
Quick Check:
CTEs feature = Support recursion [OK]

Quick Trick: CTEs enable recursion for hierarchical data queries [OK]

Common Mistakes:

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Which of the following is a key advantage of using CTEs in SQL queries?