PostgreSQL - Triggers in PostgreSQL
Which timing option is used in PostgreSQL triggers to validate data before it is inserted?
Which timing option is used in PostgreSQL triggers to validate data before it is inserted?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall trigger timing options
Triggers can run BEFORE or AFTER data changes.Step 2: Choose timing for validation before insert
BEFORE INSERT triggers run before data is saved, allowing validation.Final Answer:
BEFORE INSERT -> Option DQuick Check:
Validation timing = BEFORE INSERT [OK]
Quick Trick: Use BEFORE triggers to check data before saving [OK]
Common Mistakes:
- Choosing AFTER triggers for pre-insert validation
- Using non-existent DURING timing
- Confusing INSTEAD OF with BEFORE
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