您不能从内部查询外部引用ODB.TASK_CARD_CONTROL.CONTROL_CATEGORY。尝试：
SELECt TASK_CARD, WM_CONCAt(pre) as ZonESFROM (SELECt TASK_CARD, CODE, CONTROL_CATEGORY FROM ODB.TASK_CARD_ConTROL WHERe ODB.TASK_CARD_CONTROL.CONTROL_CATEGORY = 'ZONE' ORDER BY CODE)GROUP BY TASK_CARD
