instr

Searches "string_expression1" for the first occurrence of "string_expression2" and returns an integer specifying the position of "string_expression2". "Integer_expression1" sets the starting position for the search. If "integer_expression1" is omitted, the search begins at the first character position of "string_expression1". "Integer_expression2" specifies the type of string comparison. "Integer_expression1" is required if "integer_expression2" is specified.

instr ( [ integer_expression1 , ] string_expression1 ,
 string_expression2 [ , integer_expression2 ] )