[Solved] Which of the following is the correct syntax to define a CTE in PostgreSQL? — Ans: WITH cte_name AS (SELECT * FROM table_name) SELECT * FROM cte_name; | PostgreSQL

PostgreSQL - Common Table Expressions

Which of the following is the correct syntax to define a CTE in PostgreSQL?

AWITH cte_name AS (SELECT * FROM table_name) SELECT * FROM cte_name;

BSELECT * FROM table_name WITH cte_name AS ();

CCREATE CTE cte_name SELECT * FROM table_name;

DWITH (SELECT * FROM table_name) AS cte_name SELECT * FROM cte_name;

Step-by-Step Solution

Solution:

Step 1: Recall CTE syntax
CTEs start with WITH, followed by the CTE name, AS, and a query in parentheses.
Step 2: Validate each option
WITH cte_name AS (SELECT * FROM table_name) SELECT * FROM cte_name; matches the correct syntax. Options A, B, and C have incorrect order or keywords.
Final Answer:
WITH cte_name AS (SELECT * FROM table_name) SELECT * FROM cte_name; -> Option A
Quick Check:
CTE syntax starts with WITH name AS (query) [OK]

Quick Trick: CTE syntax always starts with WITH name AS (query) [OK]

Common Mistakes:

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Which of the following is the correct syntax to define a CTE in PostgreSQL?