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Using Subqueries with the EXISTS Operators in SQL Server
How To Use Subqueries with the EXISTS Operators in SQL Server?
✍: FYIcenter.com
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 fyi_links table that there are rows existing in the fyi_rates table with the same id.
SELECT id, url, tag, YEAR(created) As year FROM fyi_links WHERE EXISTS ( SELECT * FROM fyi_rates WHERE fyi_rates.id = fyi_links.id) GO id url tag Year 101 dev.fyicenter.com DEV 2006 102 dba.fyicenter.com DBA 2007 103 sqa.fyicenter.com SQA 2007
Note that the subquery uses columns from the source table of the outer query.
⇒ Using Subqueries in the FROM Clause in SQL Server
⇐ Using Subqueries with the IN Operators in SQL Server
⇑ Using SELECT Statements with Joins and Subqueries in SQL Server
2016-10-29, 1433🔥, 0💬
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