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          MySQL Query : SELECT `userid` FROM `simwe_db`.`v9_yp_relation` WHERE group by userid
          MySQL Error : 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 'group by userid' at line 1
          MySQL Errno : 1064
          Message : 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 'group by userid' at line 1
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