Which of the following correctly defines two CTEs named first_cte and second_cte in a PostgreSQL query?

easy📝 Syntax Q3 of 15

PostgreSQL - Common Table Expressions

Which of the following correctly defines two CTEs named first_cte and second_cte in a PostgreSQL query?

AWITH first_cte SELECT 1, second_cte SELECT 2 SELECT * FROM second_cte;

BWITH first_cte (SELECT 1), second_cte (SELECT 2) SELECT * FROM second_cte;

CWITH first_cte = (SELECT 1), second_cte = (SELECT 2) SELECT * FROM second_cte;

DWITH first_cte AS (SELECT 1), second_cte AS (SELECT 2) SELECT * FROM second_cte;

Step-by-Step Solution

Solution:

Step 1: Review CTE syntax
CTEs are defined using WITH cte_name AS (subquery).
Step 2: Check each option
WITH first_cte AS (SELECT 1), second_cte AS (SELECT 2) SELECT * FROM second_cte; correctly uses AS and parentheses for both CTEs.
Final Answer:
WITH first_cte AS (SELECT 1), second_cte AS (SELECT 2) SELECT * FROM second_cte; -> Option D
Quick Check:
CTE syntax requires AS and parentheses [OK]

Quick Trick: CTEs need AS and parentheses [OK]

Common Mistakes:

Master "Common Table Expressions" in PostgreSQL

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free