[Solved] Identify the error in this SQL query:WITH first_cte AS (SELECT 100 AS amount), second_cte AS (SELECT amount FROM third_cte) SELECT * FROM second_cte; | SQL

SQL - Common Table Expressions (CTEs)

Identify the error in this SQL query:

WITH first_cte AS (SELECT 100 AS amount), second_cte AS (SELECT amount FROM third_cte) SELECT * FROM second_cte;

Asecond_cte should not select from first_cte

Bfirst_cte is missing a SELECT statement

Csecond_cte references an undefined CTE named third_cte

DThe final SELECT statement should select from first_cte

Step-by-Step Solution

Solution:

Step 1: Review CTE definitions
first_cte and second_cte are defined; third_cte is not defined anywhere.
Step 2: Check references
second_cte tries to select from third_cte, which does not exist.
Final Answer:
second_cte references an undefined CTE named third_cte -> Option C
Quick Check:
All referenced CTEs must be defined [OK]

Quick Trick: All CTE references must be defined earlier [OK]

Common Mistakes:

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