Question

表格 ARMASTER =客户信息 ORDERHEAD =销售订单信息（送货到，开帐单）

嘿大家好！我对SQL仍然很陌生，我相信我很快就会把它拿起来。我现在已经绞尽脑汁待了几个小时，并在办公室周围询问，似乎没有人有解决方案。

我正在尝试确定客户帐户被用作SHIP TO位置的次数。比尔到位。

SELECT ARMASTER.CUSTOMER,
   ARMASTER.DIVISION,
   ARMASTER.STATUS,
   ARMASTER.CUHEAD AS "MASTER",
   COUNT (ORDERHEAD.BILLTO) AS "COUNT_BILL",
   COUNT (ORDERHEAD.SHIPTO) AS "COUNT_SHIP"

FROM ARMASTER

LEFT OUTER JOIN ORDERHEAD
 ON ARMASTER.CUSTOMER = ORDERHEAD.BILLTO
LEFT OUTER JOIN ORDERHEAD
 ON ARMASTER.CUSTOMER = ORDERHEAD.SHIPTO

GROUP BY ARMASTER.CUSTOMER,
         ARMASTER.DIVISION,
         ARMASTER.STATUS,
         ARMASTER.CUHEAD

而且我甚至都没有遥控器得到我应该得到的东西。但是，当我删除其中一个连接时，计数正是它应该是1或者其他的连接。

任何指导都将非常感谢！谢谢！

Answer 1

我认为它也可以起作用

    SELECT CUSTOMER,
       DIVISION,
       STATUS,
       CUHEAD AS "MASTER",
       (SELECT COUNT(1) FROM ORDERHEAD WHERE SHIPTO = ARMASTER.CUSTOMER ) AS "COUNT_BILL",
       (SELECT COUNT(1) FROM ORDERHEAD WHERE BILLTO = ARMASTER.CUSTOMER ) AS "COUNT_SHIP"
FROM ARMASTER

Oracle SQL从同一个表中的2个不同列返回主键的计数

1 个答案: