Powertips » SQL Server String Functions http://scripting.chaindb.com Programmer tips Tue, 15 May 2012 23:56:52 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 CHARINDEX vs PATINDEX http://scripting.chaindb.com/2011/04/15/charindex-vs-patindex/ http://scripting.chaindb.com/2011/04/15/charindex-vs-patindex/#comments Fri, 15 Apr 2011 02:00:19 +0000 admin http://scripting.chaindb.com/?p=952 Both functions take two arguments. With PATINDEX, you must include percent signs before and after the pattern, unless you are looking for the pattern as the first (omit the first %) or last (omit the last %) characters in a column. For CHARINDEX, the pattern cannot include wildcard characters. The second argument is a character expression, usually a column name, in which Adaptive Server searches for the specified pattern.

Example of CHARINDEX:
USE AdventureWorks;
GO
SELECT CHARINDEX(‘ensure’, DocumentSummary)
FROM Production.Document
WHERE DocumentID = 3;
GO

Examples of PATINDEX:
USE AdventureWorks;
GO
SELECT PATINDEX(‘%ensure%’,DocumentSummary)
FROM Production.Document
WHERE DocumentID = 3;
GO

Source

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