select a.USER_ID, a.USER_NAME, a.NAME, b.POSITION_NAME + "," + d.POSITION_NAME from TM_USER a, TM_POSITION b, TM_POSITION_USER c ,TM_POSITION d where a.USER_ID = c.USER_ID and b.POSITION_ID = c.POSITION_ID and b.POSITION_ID = d.POSITION_ID and b.POSITION_NAME <> d.POSITION_NAME
from TM_USER a, TM_POSITION b, TM_POSITION_USER c ,TM_POSITION d
where a.USER_ID = c.USER_ID and b.POSITION_ID = c.POSITION_ID and b.POSITION_ID = d.POSITION_ID and b.POSITION_NAME <> d.POSITION_NAME