[Solved] What happens when an INSERT trigger is defined as BEFORE INSERT on a table? — Ans: The trigger runs before the new row is inserted into the table | SQL

SQL - Triggers

What happens when an INSERT trigger is defined as BEFORE INSERT on a table?

AThe trigger runs after the new row is inserted into the table

BThe trigger runs before the new row is inserted into the table

CThe trigger prevents any insert operation on the table

DThe trigger runs only if the insert fails

Step-by-Step Solution

Solution:

Step 1: Understand trigger timing
BEFORE INSERT triggers execute before the actual insert happens.
Step 2: Apply timing to the insert operation
This means the trigger code runs first, allowing modification or validation before insertion.
Final Answer:
The trigger runs before the new row is inserted into the table -> Option B
Quick Check:
Trigger timing = BEFORE INSERT [OK]

Quick Trick: BEFORE triggers run before data insertion [OK]

Common Mistakes:

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What happens when an INSERT trigger is defined as BEFORE INSERT on a table?