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SQL Server: Check if string contains substring with CHARINDEX function

If you need to look for a specific word or substring within a string, you can achieve it with the help of SQL Server CHARINDEX function

CHARINDEX function is used to search for specific word or substring in overall string and returns its starting position of match. If no matching word found then it will return 0.

CHARINDEX syntax:

CHARINDEX (expressionToFind, expressionToSearch [, start_location ] )

Example to find specific word:

DECLARE @testStr VARCHAR(250)
SET @testStr='This is a test string'
SELECT CHARINDEX('test', @testStr)

Output:

-----------
11
(1 row(s) affected)

Example to find word with specific start location defined:

DECLARE @testStr VARCHAR(250)
SET @testStr = 'This is a test string'
SELECT CHARINDEX('test', @testStr, 5)

Output:

-----------
11
(1 row(s) affected)
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