Combine CHARINDEX with substring
1>
2> DECLARE @FullName VarChar(25)
3> SET @FullName = 'www.java2s.com'
4>
5> SELECT SUBSTRING(@FullName, 1,CHARINDEX('java2s', @FullName) - 1)
6> GO
-------------------------
www.
(1 rows affected)
1>
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