You want to reclaim disk space immediately after deleting many rows from a large table sales. Which command should you use?

hard📝 Application Q8 of 15

PostgreSQL - Transactions and Concurrency

You want to reclaim disk space immediately after deleting many rows from a large table sales. Which command should you use?

AREINDEX sales;

BVACUUM sales;

CANALYZE sales;

DVACUUM FULL sales;

Step-by-Step Solution

Solution:

Step 1: Identify command that reclaims space immediately
VACUUM FULL compacts the table and frees disk space immediately.
Step 2: Compare with other commands
Regular VACUUM delays space freeing, ANALYZE updates stats only, REINDEX rebuilds indexes.
Final Answer:
VACUUM FULL sales; -> Option D
Quick Check:
Immediate space reclaim = VACUUM FULL [OK]

Quick Trick: Use VACUUM FULL to reclaim space immediately [OK]

Common Mistakes:

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