살려주세요 업그레이드하니깐 이상한게 막 떠여..ㅠㅠ

select * from where po_start_date < '2010-05-15 18:34:19' and po_end_date > '2010-05-15 18:34:19' and po_openchk = '1'

1064 : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'where po_start_date < '2010-05-15 18:34:19' and po_end_date > '2010-05-15 18:34:' at line 1

error file : /index.php

이게 뭐죠? ㅇ쩌라는거죠?