patindex

Returns an integer representing the starting position of the first occurrence of "string_expression1" in "string_expression2" or returns 0 if "string_expression1" is not found. By default, patindex returns the offset in characters. The offset can be returned in bytes by setting the return type to bytes. The % wildcard character must precede and follow the pattern in "string_expression1", except when searching for first or last characters.

patindex ( string_expression1 , string_expression2 [ using 
{bytes|chars|characters} ] )