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Queries and Cursors

开发者 https://www.devze.com 2023-01-13 15:01 出处:网络
Will queries internal having one or more subquery result in cursors at SQL Server level. In otherwords I am not explicitly using cursors but i have query with a sub query. Now for processing this que

Will queries internal having one or more subquery result in cursors at SQL Server level.

In otherwords I am not explicitly using cursors but i have query with a sub query. Now for processing this query will SQL server create cursors开发者_StackOverflow internally.


No sql server do not create any cursotr the subquery. go trough the below link for more details

There are two kinds of subqueries: standard and correlated. The standard subquery executes once, and its results are fed into the parent query. A correlated subquery executes once for every row retrieved by the parent query. In this tip, I shed some light on the power of nested subqueries (I'll save correlated subqueries for another day).

Subquery Fundamentals

Working with nested subqueries in SQL Server

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