-- have a try.mysql>select b.ORDERDATE,a.DEPT_NO,sum(c.QTY) as QTY
from DEPARTMENT a left outer join INVENTORY b
on a.DEPT_NO=b.DEPT_NO
left outer join PO_DETAILS c
on b.ITEM=c.ITEM
group by b.ORDERDATE,a.DEPT_NO;
from DEPARTMENT a left outer join INVENTORY b
on a.DEPT_NO=b.DEPT_NO
left outer join PO_DETAILS c
on b.ITEM=c.ITEM
group by b.ORDERDATE,a.DEPT_NO;
解决方案 »
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