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What is a CTE (Common Table Expression), and how is it different from a subquery?

Question Posted / nashiinformaticssolutions

Answers were Sorted based on User's Feedback



What is a CTE (Common Table Expression), and how is it different from a subquery?..

Answer / nashiinformaticssolutions

• CTE: Temporary result set defined using WITH and reusable within the query. Improves readability for complex queries.
• Subquery: Nested query executed each time it is called. Example:
WITH SalesCTE AS (
SELECT employee_id, SUM(sales) AS total_sales
FROM sales
GROUP BY employee_id
)
SELECT * FROM SalesCTE WHERE total_sales > 5000;

Is This Answer Correct ?    0 Yes 0 No

What is a CTE (Common Table Expression), and how is it different from a subquery?..

Answer / glibwaresoftsolutions

• CTE: Temporary result set defined using WITH and reusable within the query. Improves readability for complex queries.
• Subquery: Nested query executed each time it is called. Example:
WITH SalesCTE AS (
SELECT employee_id, SUM(sales) AS total_sales
FROM sales
GROUP BY employee_id
)
SELECT * FROM SalesCTE WHERE total_sales > 5000;

Is This Answer Correct ?    0 Yes 0 No

What is a CTE (Common Table Expression), and how is it different from a subquery?..

Answer / hr@tgksolutions.com

• CTE: Temporary result set defined using WITH and reusable within the query. Improves readability for complex queries.
• Subquery: Nested query executed each time it is called. Example:
WITH SalesCTE AS (
SELECT employee_id, SUM(sales) AS total_sales
FROM sales
GROUP BY employee_id
)
SELECT * FROM SalesCTE WHERE total_sales > 5000;

Is This Answer Correct ?    0 Yes 0 No

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