[Solved] What is the main purpose of a RECURSIVE CTE in SQL when working with hierarchical data? — Ans: To repeatedly query connected rows to explore hierarchical relationships | SQL

SQL - Common Table Expressions (CTEs)

What is the main purpose of a RECURSIVE CTE in SQL when working with hierarchical data?

ATo speed up simple SELECT queries without joins

BTo repeatedly query connected rows to explore hierarchical relationships

CTo create temporary tables for storing unrelated data

DTo update multiple tables at once

Step-by-Step Solution

Solution:

Step 1: Understand the role of recursive CTEs
Recursive CTEs allow querying hierarchical or connected data by repeatedly joining rows to find related entries.
Step 2: Compare options with this purpose
Only To repeatedly query connected rows to explore hierarchical relationships describes this repeated querying of connected rows to explore hierarchies.
Final Answer:
To repeatedly query connected rows to explore hierarchical relationships -> Option B
Quick Check:
Recursive CTE = repeated connected row queries [OK]

Quick Trick: Recursive CTEs repeatedly join related rows to explore hierarchies [OK]

Common Mistakes:

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What is the main purpose of a RECURSIVE CTE in SQL when working with hierarchical data?