Question

您好我在这里问了一个问题：Return only rows whose max value is less than specified

我得到的答案非常适合我的想法：

SELECT *
FROM tbldealermobiles
  INNER JOIN tblhistory ON tbldealermobiles.FCS = tblhistory.FCS
  INNER JOIN tblAllDealers ON tbldealermobiles.FCS = tblAllDealers.FCS
WHERE tblAllDealers.CustGroup in ('Virtual', 'Outbound')
GROUP BY tbldealermobiles.mobilenumber 
HAVING MAX(tblhistory.PurchaseDate) <
        MAX(case when tblAllDealers.CustGroup = 'Virtual' then date('2013-03-22')
                 when tblAllDealers.CustGroup = 'Outbound' then date('2013-04-21')
            end)
ORDER BY tblhistory.PurchaseDate DESC

我试图通过简单地将小于号码更改为大于这样的符号来重新定位它：

SELECT *
FROM tbldealermobiles
  INNER JOIN tblhistory ON tbldealermobiles.FCS = tblhistory.FCS
  INNER JOIN tblAllDealers ON tbldealermobiles.FCS = tblAllDealers.FCS
WHERE tblAllDealers.CustGroup in ('Virtual', 'Outbound')
GROUP BY tbldealermobiles.mobilenumber 
HAVING MAX(tblhistory.PurchaseDate) >
        MAX(case when tblAllDealers.CustGroup = 'Virtual' then date('2013-03-22')
                 when tblAllDealers.CustGroup = 'Outbound' then date('2013-04-21')
            end)
ORDER BY tblhistory.PurchaseDate DESC

但我得到的移动号码在指定的日期之前，这个查询可以像这样使用，还是需要重新编写？

输出：

我得到795行，这是最后15行：

PurchaseDate CustGroup
2012-05-12  Outbound
2012-05-12  Outbound
2012-05-11  Virtual
2012-05-10  Virtual
2012-05-10  Outbound
2012-05-10  Outbound
2012-05-10  Virtual
2012-05-10  Outbound
2012-05-10  Outbound
2012-05-10  Virtual
2012-05-09  Outbound
2012-05-09  Outbound
2012-05-09  Outbound
2012-05-08  Outbound
2012-05-08  Outbound

提前致谢。

Answer 1

我会像这样完成您的ORIGINAL查询..

select *
FROM tbldealermobiles m
INNER JOIN tblhistory h ON m.FCS = h.FCS
INNER JOIN tblAllDealers a ON m.FCS = a.FCS
WHERE a.CustGroup in ('Virtual', 'Outbound')
and h.PurchaseDate = (
    select max(h2.PurchaseDate) from tblhistory h2
    where h2.fcs = a.fcs)
and (a.CustGroup = 'Virtual' AND
     h.PurchaseDate < date('2013-03-22')
  or 
    a.CustGroup = 'Outbound' AND 
    h.PurchaseDate < date('2013-04-21'))
ORDER BY h.PurchaseDate DESC

然后，对于此查询，只需将<符号更改为>。

Answer 2

@ ch3my-我可能在这里遗漏了一些东西，但是如何将 AND PurchaseDate＆gt; ='2013-05-01'添加到WHERE子句中（将日期设置为您的最短日期寻找）

仅返回最大值大于指定的行

2 个答案: