[Solved] Identify the error in this query:SELECT u.id, o.amount FROM users u JOIN LATERAL (SELECT amount FROM orders WHERE user_id = u.id) o; | PostgreSQL

PostgreSQL - Subqueries in PostgreSQL

Identify the error in this query:

SELECT u.id, o.amount FROM users u JOIN LATERAL (SELECT amount FROM orders WHERE user_id = u.id) o;

AIncorrect use of LATERAL keyword

BMissing ON clause for JOIN LATERAL

CSubquery must have LIMIT clause

DNo error, query is valid

Step-by-Step Solution

Solution:

Step 1: Check JOIN LATERAL syntax
JOIN LATERAL requires an ON clause to specify join condition.
Step 2: Analyze given query
The query uses JOIN LATERAL without ON clause, causing syntax error.
Final Answer:
Missing ON clause for JOIN LATERAL -> Option B
Quick Check:
JOIN LATERAL needs ON clause [OK]

Quick Trick: JOIN LATERAL must have ON clause [OK]

Common Mistakes:

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