Saturday, 7 January 2023

CTE stands for Common Table Expression

 CTE stands for Common Table Expression. It is a named temporary result set that you can reference within a SELECT, INSERT, UPDATE, DELETE, or CREATE VIEW statement. The result set is derived from a SELECT statement within the CTE.


Here is an example of how to use a CTE:



WITH cte AS (

   SELECT *

   FROM table

   WHERE condition

)

SELECT *

FROM cte

CTEs can be used to simplify complex queries by breaking them up into smaller, more manageable pieces and can improve the readability and maintainability of your code. They can also be used to improve the performance of a query by allowing you to reuse a subquery multiple times.




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