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⟩ How To Use Subqueries with the EXISTS Operators in MS SQL Server?

A subquery can be used with the EXISTS operator as "EXISTS (subquery)", which returns true if the subquery returns one or more rows. The following statement is a good example of "EXISTS (subquery)". It returns rows from ggl_links table that there are rows existing in the ggl_rates table with the same id.

SELECT id, url, tag, YEAR(created) As year

FROM ggl_links WHERE EXISTS (

SELECT * FROM ggl_rates

WHERE ggl_rates.id = ggl_links.id)

GO

id url tag Year

101 www.rendc.org main 2006

102 www.rendc.org/html DBA 2007

103 www.rendc.org/sql SQL 2007

Note that the subquery uses columns from the source table of the outer query.

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