Question

我尝试使用LEFT JOIN来生成COUNT，但我在格式上苦苦挣扎，因为我正在使用WHERE过滤掉计数。我需要两个表上的WHERE。这就是我所拥有的

SELECT Count(rL.SERIAL_NUMBER)
FROM   [ROBOTICS_OPTICS_UAT].[dbo].[AOF_OPTIC_RESULTS] AS rL
WHERE  EXISTS (SELECT *
               FROM   [ROBOTICS_OPTICS_UAT].[dbo].[AOF_ORDER_OPTICS] AS oL
               WHERE  oL.[SERIAL_NUMBER] = rL.[SERIAL_NUMBER]
                      AND rL.[REJECT] = 0)

我将AND oL.[SO_LINE_NUMBER] = '43776'添加到混音后，会产生0计数。表中存在该值，并且我试图多次重写这个值。我错过了什么或做错了什么？

Answer 1

SELECT  COUNT(rL.SERIAL_NUMBER)
FROM    [ROBOTICS_OPTICS_UAT].[dbo].[AOF_OPTIC_RESULTS] AS rL
INNER JOIN [ROBOTICS_OPTICS_UAT].[dbo].[AOF_ORDER_OPTICS] AS oL ON  oL.[SERIAL_NUMBER] = rL.[SERIAL_NUMBER]
WHERE
rL.[REJECT] = 0  AND oL.[SO_LINE_NUMBER] = '43775'

Answer 2

你应该真正分开这些条件。。。一个用于子查询，另一个用于外部查询：

SELECT Count(rL.SERIAL_NUMBER)
FROM [ROBOTICS_OPTICS_UAT].[dbo].[AOF_OPTIC_RESULTS] rL
WHERE EXISTS (SELECT 1
              FROM  [ROBOTICS_OPTICS_UAT].[dbo].[AOF_ORDER_OPTICS] oL
              WHERE oL.[SERIAL_NUMBER] = rL.[SERIAL_NUMBER] AND
                    oL.[SO_LINE_NUMBER] = '43776'
             ) AND
       rL.[REJECT] = 0;

但是，我不认为这会导致您的特定问题。

LEFT JOIN W / FILTER

2 个答案: