[Solved] Identify the error in this cursor usage:DECLARE cur CURSOR FOR SELECT name FROM products; FETCH NEXT FROM cur; | PostgreSQL

PostgreSQL - Advanced PL/pgSQL

Identify the error in this cursor usage:

DECLARE cur CURSOR FOR SELECT name FROM products;
FETCH NEXT FROM cur;

ACursor name is invalid

BCursor declaration syntax is wrong

CFETCH syntax is incorrect

DCursor is fetched before being opened

Step-by-Step Solution

Solution:

Step 1: Check cursor lifecycle steps
Cursor must be declared, then opened, then fetched.
Step 2: Spot missing OPEN statement
Code fetches without opening cursor, causing error.
Final Answer:
Cursor is fetched before being opened -> Option D
Quick Check:
Missing OPEN before FETCH = error [OK]

Quick Trick: OPEN cursor before FETCH to avoid errors [OK]

Common Mistakes:

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Identify the error in this cursor usage: