Question

我有三个表Invoice，Account和Visits

每个都有一个共同的主键（AccountID）。我需要为7月份没有访问过的帐户提取数据，并拥有一个有效的帐户以允许在该月访问（来自Invoice - scheduletype和Account - startdate）

我尝试过使用多个连接，但是由于我需要它而无法获取数据，而且我对SQL很新。请问有人可以帮我解决一些问题吗？

Answer 1

select A.*
from Accounts A
where A.AccountID NOT IN
    (Select V.AcocountID
     From Visits V
     Where V.date like '%July%'   //replace by appropriate condition
    ) AND
     A.AccountID IN
    (Select I.AccountID
     From Invoice I
     Where I.type = Invoice        //replace by appropriate condition
    ) AND
    A.startDate< July              //replace by appropriate condition

Answer 2

借用上一个答案，您也可以这样做（我更喜欢使用EXISTS来查看AccountID是否在那里 - 如果有的话，它会立即停止查看）。

SELECT A.* FROM Accounts A WHERE A.AccountID NOT IN
    (SELECT V.AccountID
        FROM Visits V
        WHERE CONVERT(date, V.date) BETWEEN '2012-07-01' AND '2012-07-31'
        -- assuming V.date is a 'datetime'. if V.date is already a 'date' then:
        -- WHERE V.date BETWEEN '2012-07-01' AND '2012-07-31'
        -- or you could say
        -- WHERE NOT(DATEPART(month, V.date) = '7' AND DATEPART(year, V.date) = '2012')
    )
    AND EXISTS (SELECT *
        FROM Invoice I
        WHERE I.type = Invoice        //or whatever
    ) AND
    A.startDate < '2012-07-01'        //or whatever

Answer 3

猜测访问日期，

SELECT  a.AccountID
FROM    Account a
WHERE   NOT EXISTS  (
                    SELECT 1 
                    FROM Invoice i 
                    WHERE i.AccountID = a.AccountID 
                    AND i.ScheduleType = 'hold'
                    AND i.StartDate < '8/1/2012'
                    AND i.EndDate >= '7/1/2012'
                    )
AND     NOT EXISTS  (
                    SELECT 1
                    FROM Visits v
                    WHERE v.AccountID = a.AccountID
                    AND v.SessionDate >= '7/1/2012'
                    AND v.SessionDate < '8/1/2012'                  
                    )
AND     a.StartDate < '8/1/2012'
AND     a.EndDate >= '7/1/2012'
GO

Answer 4

使用以下查询：

Select A.*
From Accounts A
left join visits v on v.AccountID = A.AccountID 
                  AND v.SessionDate >= '2012-07-01'
                  AND v.SessionDate < '2012-08-01'
left join Invoice I ON I.AccountID = A.AccountID
                   AND I.ScheduleType = 'hold'
Where V.AccountID IS NULL
   and I.AccountID IS NULL
   and A.startDate < '2012-07-01'

来自3个表的数据与主键共同

4 个答案: