Mysql get substring before the last occurence of string -

i want substring of string beginning last occurence of search string.

example string: "abcd corp org work with. abcd corp incorporated"

search string: "corp"

expected output: "abcd corp org work with. abcd "

ie. string uptil last occurrence of search string.could suggest best way it?

here way, not efficient way:

  mysql> set @a = "abcd corp org work with. abcd corp incorporated"; query ok, 0 rows affected (0.00 sec)  mysql> select substring(@a, 1, length(@a) - length('corp') - instr(reverse(@a), reverse('corp')) + 1); +-----------------------------------------------------------------------------------------+ | substring(@a, 1, length(@a) - length('corp') - instr(reverse(@a), reverse('corp')) + 1) | +-----------------------------------------------------------------------------------------+ | abcd corp org work with. abcd corp in                                      | +-----------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)