[Solved] Find the error in this SQL snippet:WITH cte AS (SELECT id, name FROM users) SELECT * FROM cte WHERE id = (SELECT id FROM cte WHERE name = 'Alice'); | SQL

SQL - Common Table Expressions (CTEs)

Find the error in this SQL snippet:

WITH cte AS (SELECT id, name FROM users) SELECT * FROM cte WHERE id = (SELECT id FROM cte WHERE name = 'Alice');

ANo error, query is valid

BCTE cannot be referenced inside its own definition

CMissing alias for subquery

DSubquery inside WHERE cannot reference CTE

Step-by-Step Solution

Solution:

Step 1: Understand CTE scope
CTE is defined once and can be referenced multiple times in the main query.
Step 2: Analyze subquery usage
The subquery inside WHERE references the CTE, which is allowed in the main query scope.
Final Answer:
No error, query is valid -> Option A
Quick Check:
CTE can be referenced multiple times [OK]

Quick Trick: CTEs can be reused multiple times in main query [OK]

Common Mistakes:

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