Returns the position of one string in another.
CHARINDEX( string-expression-1, string-expression-2 )
string-expression-1 The string for which you are searching.
string-expression-2 The string to be searched.
The first character of string-expression-1 is identified as 1. If the string being searched contains more than one instance of the other string, then the CHARINDEX function returns the position of the first instance.
If the string being searched does not contain the other string, then the CHARINDEX function returns 0.
SQL/2003 Vendor extension.
The following statement returns last and first names from the Surname and GivenName tables, but only when the last name includes the letter K:
SELECT Surname, GivenName FROM Employees WHERE CHARINDEX( 'K', Surname ) = 1 ;