Question

如何从sql表中获取数据在日期之间不存在的数据

我正在使用三张桌子

客户大师
每日发送
EmptyCylinderRecd

我想找到不在Dailydispatch和EmptyCylinderRecd表中的客户。我已尝试过此查询，但预期结果未显示：

select * 
from CustomerMaster 
where 
   not EXISTS (select * 
               from DailyDispatch  
               where OrderDate between '1/22/2014' and '08/10/2014') or 
   not exists (select * 
               from EmptyCylinderRecd 
               where Date between '1/22/2014' and '08/10/2014')

Answer 1

Name is the common field

然后试试这个：

select * 
from CustomerMaster where Name NOT IN 
(select Name from DailyDispatch  
where CAST(OrderDate as DATE) between '2014-01-22' and '2014-08-10' 
and Name is NOT NULL )

union 

select * 
from CustomerMaster where Name NOT IN 
(select Name from EmptyCylinderRecd 
where  CAST(Date as DATE)between '2014-01-22' and '2014-08-10'
and Name is NOT NULL)

注意：如果您使用具有正确索引的CustomerID列之类的列会更好在上面。 Union将提供query1和query2的常见结果。在性能方面使用Not Exists作为其他建议。 NOT IN vs NOT EXISTS

Answer 2

SELECT * 
FROM   customermaster C 
WHERE  NOT EXISTS (SELECT 1 
                   FROM   dailydispatch D 
                   WHERE  C.NAME = D.NAME 
                         AND D.orderdate BETWEEN '2014-22-1' AND '2014-08-10') 
        OR NOT EXISTS (SELECT 1 
                       FROM   emptycylinderrecd E 
                       WHERE  C.NAME = E.NAME 
                              AND E.date BETWEEN '2014-22-1' AND '2014-08-10')

Answer 3

如果DailyDispatch或EmptyCylinderRecd中的[Name]列可以为null（列定义），我会投票给NOT IN解决方案，因为这可能会导致错误的结果。

相反，我会使用“NOT EXISTS”方法：

SELECT cm.* 
FROM CustomerMaster cm
WHERE 
NOT EXISTS 
    (SELECT 1 
     FROM DailyDispatch dp 
     WHERE cm.YourCol1 = dp.YourCol1 AND dp.OrderDate BETWEEN '20140122' and '20140810'
     )
OR NOT EXISTS
    (SELECT 1 
     FROM EmptyCylinderRecd ecr 
     WHERE cm.YourCol1 = ecr.YourCol1 AND ecr.[Date] BETWEEN '20140122' and '20140810'
    )

请注意，我将日期格式更改为符合ISO标准，以避免因DATEFORMAT设置而导致错误的结果或错误。

如何从sql表中获取数据在日期之间不存在的数据

3 个答案: