[Solved] What is the purpose of the ON CONFLICT clause in a PostgreSQL INSERT statement? — Ans: To specify what to do when a unique constraint violation occurs during insert | PostgreSQL

PostgreSQL - Set Operations and Advanced Queries

What is the purpose of the ON CONFLICT clause in a PostgreSQL INSERT statement?

ATo specify what to do when a unique constraint violation occurs during insert

BTo create a new table if it does not exist

CTo delete rows that conflict with the insert

DTo select rows from another table during insert

Step-by-Step Solution

Solution:

Step 1: Understand the role of ON CONFLICT
The ON CONFLICT clause handles conflicts caused by unique constraints during an insert operation.
Step 2: Identify the correct behavior
It allows you to specify actions like DO NOTHING or DO UPDATE when a conflict occurs.
Final Answer:
To specify what to do when a unique constraint violation occurs during insert -> Option A
Quick Check:
ON CONFLICT purpose = specify conflict handling [OK]

Quick Trick: ON CONFLICT handles duplicate key errors during insert [OK]

Common Mistakes:

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What is the purpose of the ON CONFLICT clause in a PostgreSQL INSERT statement?