charindex

Searches "string_expression2" for the first occurrence of "string_expression1" and returns an integer. "Start_location" is the character position to start searching for "string_expression1" in "string_expression2". If "start_location" is not specified, is a negative number, or is zero, the search starts at the beginning of "string_expression2".

charindex ( string_expression1 , string_expression2 [ ,
 start_location ]  )