将两个SQL语句与sum结合使用

Question

两个陈述需要结合起来。

select INVOICEAMOUNT, itemid 
from MTS_NONPAYMENT

select SUM(AMOUNT) AS SUM, ITEMID 
from CUS_GLACCOUNT 

公共专栏itemid。每次我尝试加入时，都会失败。我做错了什么？

Answer 1

从根本上说，您似乎缺少group by。我怀疑以下是你想要的：

select itemid, sum(invoiceamount) as invoiceamount, sum(sum) as sum
from ((select itemid, sum(INVOICEAMOUNT) as invoiceamount, 0 as sum
       from MTS_NONPAYMENT
       group by itemid
      ) union all
      (select itemid, 0, SUM(AMOUNT)
       from CUS_GLACCOUNT 
       group by itemid
      ) 
     ) x
group by itemid;

要获得不相等的值，请使用：

having sum(invoiceamount) <> sum(sum) 

在查询结束时。