What benefit does a partial index with a WHERE clause provide compared to a full index in PostgreSQL?

easy📝 Conceptual Q1 of 15

PostgreSQL - Indexing Strategies

What benefit does a partial index with a WHERE clause provide compared to a full index in PostgreSQL?

AIt automatically updates the table data when rows change

BIt reduces index size by indexing only rows that meet the condition

CIt creates a backup of the table data for recovery

DIt enforces data integrity constraints on the table

Step-by-Step Solution

Solution:

Step 1: Understand partial index purpose
A partial index indexes only a subset of rows that satisfy the WHERE condition.
Step 2: Compare with full index
A full index indexes all rows, which can be larger and slower to maintain.
Final Answer:
It reduces index size by indexing only rows that meet the condition -> Option B
Quick Check:
Partial indexes save space and improve performance for filtered queries [OK]

Quick Trick: Partial indexes index fewer rows, saving space [OK]

Common Mistakes:

Master "Indexing Strategies" in PostgreSQL

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free