Conditional Case in WHERE

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Conditional Case in WHERE

ramrajan

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Points: 1737
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January 5, 2015 at 11:02 pm

#313479

-- Can anyone help me conditional based search in where clause I am getting error
Not able to post entire query please refer text file.

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Koen Verbeeck SSC Guru Points: 259115 More actions · Answer 1

You forgot the END at the end (pun intended) of the CASE statement.

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ChrisM@Work SSC Guru Points: 186127 More actions · Answer 2

SELECT *

FROM #parent p

LEFT OUTER JOIN #child c

ON c.CID = p.PID AND (@search = '' OR c.ChildName LIKE '%' + @search + '%')

------------------------------------------------------------------------------

SELECT *

FROM #parent p

LEFT OUTER JOIN #child c

ON c.CID = p.PID

WHERE @search = '' OR (c.CID = p.PID AND c.ChildName LIKE '%' + @search + '%')

See http://sqlinthewild.co.za/index.php/2007/11/27/parameter-sniffing/[/url] and http://sqlinthewild.co.za/index.php/2009/03/19/catch-all-queries/[/url]

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

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Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden