[Solved] Why might a materialized view become outdated compared to a regular view in PostgreSQL? — Ans: Because materialized views do not automatically update when base tables change. | PostgreSQL

PostgreSQL - Views and Materialized Views

Why might a materialized view become outdated compared to a regular view in PostgreSQL?

ABecause regular views store data physically and materialized views do not.

BBecause materialized views do not automatically update when base tables change.

CBecause materialized views run the underlying query every time they are accessed.

DBecause regular views cache data and materialized views do not.

Step-by-Step Solution

Solution:

Step 1: Understand update behavior of materialized views
Materialized views store data and require manual or scheduled refresh to update.
Step 2: Contrast with regular views
Regular views run the query on each access, always showing current data.
Final Answer:
Because materialized views do not automatically update when base tables change. -> Option B
Quick Check:
Outdated data reason = D [OK]

Quick Trick: Materialized views need refresh; regular views always current [OK]

Common Mistakes:

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Why might a materialized view become outdated compared to a regular view in PostgreSQL?