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What is the main purpose of using WITH CHECK OPTION in a PostgreSQL view?

easy📝 Conceptual Q11 of 15
PostgreSQL - Views and Materialized Views
What is the main purpose of using WITH CHECK OPTION in a PostgreSQL view?
ATo prevent inserts or updates that violate the view's filter conditions
BTo speed up query execution on the view
CTo allow views to be updated without restrictions
DTo create a temporary table instead of a view
Step-by-Step Solution
Solution:
  1. Step 1: Understand the role of WITH CHECK OPTION

    This option ensures that any data inserted or updated through the view must satisfy the view's filter conditions.
  2. Step 2: Identify what it prevents

    It prevents changes that would cause rows to fall outside the view's defined criteria, keeping data consistent.
  3. Final Answer:

    To prevent inserts or updates that violate the view's filter conditions -> Option A
  4. Quick Check:

    WITH CHECK OPTION blocks invalid changes = A [OK]
Quick Trick: Check option stops changes outside view filters [OK]
Common Mistakes:
  • Thinking it speeds up queries
  • Believing it allows unrestricted updates
  • Confusing it with temporary tables

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