Question

首先，感谢您的时间和帮助！

我有两张桌子：

表1

PersId     name       lastName   city
---------------------------------------
1          John       Smith      Tirana
2          Leri       Nice       Tirana
3          Adam       fortsan    Tirana

表2

Id       PersId      salesDate
--------------------------------------------
1         1          2017-01-22 08:00:40 000
2         2          2017-01-22 09:00:00 000
3         1          2017-01-22 10:00:00 000
4         1          2017-01-22 20:00:00 000
5         3          2017-01-15 09:00:00 000
6         1          2017-01-21 09:00:00 000
7         1          2017-01-21 10:00:00 000
8         1          2017-01-21 18:55:00 000

我希望看到根据每个城市的两个日期之间的第一次近期销售每天如果我没有销售，我想把它带空

 SalesDate > '2017-01-17 09:00:00 000' 
 and SalesDate < '2017-01-23 09:00:00 000'

表2，id = 5，因为记录不在指定的日期范围内

如果我希望我的结果看起来像

Id      PersId     MinSalesDate                 MaxSalesDate             City 
-----------------------------------------------------------------------------
1         1        2017-01-22 08:00:40 000      2017-01-22 20:00:00 000 Tirana
2         2        2017-01-22 09:00:00 000      null                   Tirana
3         3        null                         null                   Tirana
4         1        2017-01-21 09:00:00 000      2017-01-21 18:55:00 000   Tirana

Answer 1

您不知道如何在结果中获取ID。您似乎只想要Row_Number（）。我会把它留下来，但这应该让你开始。您可能必须在数据范围检查中解决转换问题，并且我没有检查查询是否存在语法错误，我将把它留给您。

Select T1.PersId, City
     , Min(T2.salesDate) MinSalesDate
     , Max(T2.salesDate) MaxSalesDate
   From Table1 T1
   Left Join Table2 T2 
     On T1.PersId = T2.PersId 
    And T2.salesDate Between '2017-01-17 09:00:00 000' And < '2017-01-23 09:00:00 000'
   Group BY T1.PersId, T2.City

Answer 2

使用row_number尝试以下操作以获取最短和最长销售日期：

        SELECT 
            T2.Id, T1.PersId, T2.MIN_salesDate, T2.MAX_salesDate, T1.City
        FROM Table1 T1
        LEFT JOIN
        (
            SELECT MIN(Id) as Id, PersId, MIN(salesDate) as MIN_salesDate, MAX(salesDate) as MAX_salesDate 
            FROM
            (
                SELECT 
                     *
                    ,ROW_NUMBER() OVER (PARTITION BY PersId ORDER BY salesDate ASC) as RNKMIN
                    ,ROW_NUMBER() OVER (PARTITION BY PersId ORDER BY salesDate DESC) as RNKMAX 
                FROM Table2 T2 
                WHERE salesDate Between '2017-01-17 09:00:00 000' And '2017-01-23 09:00:00 000'
            ) temp
            WHERE RNKMIN = 1 or RNKMAX = 1
            GROUP BY PersId
        ) T2
        on T1.PersId = T2.PersId

T-SQL最大日期和两个日期之间的最小日期

2 个答案: