如何在SQL查询中将另一列的最大日期转换为新列？_Sql_Sql Server_Ssis_Max_Temp Tables

如何在SQL查询中将另一列的最大日期转换为新列？

sql sql-server ssis

如何在SQL查询中将另一列的最大日期转换为新列？,sql,sql-server,ssis,max,temp-tables,Sql,Sql Server,Ssis,Max,Temp Tables,我有一个带有order id和date列的表，我需要将max of enddate列放入一个新列中。下面的示例 ID OrderId StartDate begindate enddate 1 2345 06/07/2011 20/08/2011 12/07/2012 2 2345 05/07/2012 11/07/2012 13/01/2014 3 2345 21/05/2014 28/10/2013 27/05/2015 4 2345

我有一个带有order id和date列的表，我需要将max of enddate列放入一个新列中。下面的示例

ID  OrderId StartDate   begindate   enddate
1   2345    06/07/2011  20/08/2011  12/07/2012
2   2345    05/07/2012  11/07/2012  13/01/2014
3   2345    21/05/2014  28/10/2013  27/05/2015
4   2345    23/05/2015  03/06/2015  02/06/2017
5   2345    27/03/2017  20/06/2017  NULL

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

因此，我试图获得的输出是：

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

所需输出

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

Max

EndDate

应位于

Lastenddate

列中，其中

EndDate

为空

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

我已经尝试过创建临时表和应用稠密排名，但我仍然缺少一些东西，你能帮我吗

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

我正在从

attreable

作为

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

SELECT id, orderid
     , CASE WHEN MAX(CASE WHEN Lasttenddate IS NULL THEN 1 ELSE 0 END) = 0 THEN MAX(enddate) END
FROM #Test
WHERE
 orderid = 2345
GROUP BY id, orderid

提前感谢。

您可以使用

交叉应用

获取

最大（结束日期）

，并将其与您的查询相结合，如下所示。如果需要，还可以根据数据量将

案例

与

行数

一起使用<当每个分区有许多行时，代码>交叉应用更好

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

SELECT id, 
       orderid, 
       startdate, 
       begindate, 
       enddate, 
       ( CASE 
           WHEN T.enddate IS NULL THEN TM.md 
           ELSE NULL 
         END ) AS LastEnddate 
FROM   @MyTable T 
       CROSS apply (SELECT Max(enddate) MD 
                    FROM   @MyTable WHERE OrderId= T.OrderId) TM 
WHERE T.orderid=2345

完整示例

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

DECLARE @MyTable TABLE 
  ( 
     id        INT, 
     orderid   INT, 
     startdate DATE, 
     begindate DATE, 
     enddate   DATE 
  ) 

INSERT INTO @MyTable 
SELECT * 
FROM   (VALUES (1, 
       2345, 
       CONVERT(DATETIME, '06/07/2011', 103), 
       CONVERT(DATETIME, '20/08/2011', 103), 
       CONVERT(DATETIME, '12/07/2012', 103)), 
               (2, 
       2345, 
       CONVERT(DATETIME, '05/07/2012', 103), 
       CONVERT(DATETIME, '11/07/2012', 103), 
       CONVERT(DATETIME, '13/01/2014', 103)), 
               (3, 
       2345, 
       CONVERT(DATETIME, '21/05/2014', 103), 
       CONVERT(DATETIME, '28/10/2013', 103), 
       CONVERT(DATETIME, '27/05/2015', 103)), 
               (4, 
       2345, 
       CONVERT(DATETIME, '23/05/2015', 103), 
       CONVERT(DATETIME, '03/06/2015', 103), 
       CONVERT(DATETIME, '02/06/2017', 103)), 
               (5, 
       2345, 
       CONVERT(DATETIME, '27/03/2017', 103), 
       CONVERT(DATETIME, '20/06/2017', 103), 
       NULL) ) t (id, orderid, startdate, begindate, enddate) 

SELECT id, 
       orderid, 
       startdate, 
       begindate, 
       enddate, 
       ( CASE 
           WHEN T.enddate IS NULL THEN TM.md 
           ELSE NULL 
         END ) AS LastEnddate 
FROM   @MyTable T 
       CROSS apply (SELECT Max(enddate) MD 
                    FROM   @MyTable WHERE OrderId= T.OrderId) TM 
WHERE T.orderid=2345

输出

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

id  orderid startdate   begindate   enddate LastEnddate
1   2345    2011-07-06  2011-08-20  2012-07-12  NULL
2   2345    2012-07-05  2012-07-11  2014-01-13  NULL
3   2345    2014-05-21  2013-10-28  2015-05-27  NULL
4   2345    2015-05-23  2015-06-03  2017-06-02  NULL
5   2345    2017-03-27  2017-06-20  NULL    2017-06-02

试试这个：

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

SELECT id, orderid,enddate, CASE WHEN enddate is null 
THEN MAX(enddate) over (partition by orderid)  else null END as LastEnddate
FROM #Test
WHERE orderid = 2345

输出：

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

id  orderid enddate LastEnddate
1   2345    2012-07-12  NULL
2   2345    2014-01-13  NULL
3   2345    2015-05-27  NULL
4   2345    2017-06-02  NULL
5   2345    NULL        2017-06-02

使用Cte，使用

行号

<代码>最大日期使用最大

行数

计算。日期输出为所需的

字符串格式

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

DECLARE @table TABLE (id INT, orderid INT, startdate VARCHAR(100), begindate VARCHAR(100), enddate VARCHAR(100))

INSERT INTO @table (ID, OrderId, StartDate, begindate, enddate)
SELECT 1, 2345, '06/07/2011', '20/08/2011', '12/07/2012'

UNION ALL

SELECT 2, 2345, '05/07/2012', '11/07/2012', '13/01/2014'

UNION ALL

SELECT 3, 2345, '21/05/2014', '28/10/2013', '27/05/2015'

UNION ALL

SELECT 4, 2345, '23/05/2015', '03/06/2015', '02/06/2017'

UNION ALL

SELECT 5, 2345, '27/03/2017', '20/06/2017', NULL;

WITH DATE
AS (
    SELECT *, ROW_NUMBER() OVER (
            PARTITION BY orderid ORDER BY enddate DESC
            ) rn
    FROM @table
    WHERE enddate IS NOT NULL
    )
SELECT t.id, t.orderid, t.startdate, t.enddate, CASE WHEN t.enddate IS NOT NULL THEN NULL ELSE convert(VARCHAR(10), (
                    SELECT max(convert(DATETIME, enddate, 103))
                    FROM DATE
                    ), 103) END DATE
FROM @table t
LEFT JOIN DATE d
    ON d.id = t.id
        AND t.orderid = d.orderid

除了你的回答之外我将使用以下查询（从性能角度）

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

在Max（enddate）解决方案中，与上一个值解决方案相比，您将获得更多的逻辑读取

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

见统计结果：

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

最大值（结束日期）-> 表“工作台”。扫描计数3，逻辑读取15，物理读取0，预读0，lob逻辑读取0，lob物理读取0，lob预读0。表“#B131B1E5”。扫描计数1，逻辑读取1，物理读取0，预读读取0，lob逻辑读取0，lob物理读取0，lob预读读取0

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

最后一个值-> 表“工作台”。扫描计数0，逻辑读取0，物理读取0，预读读取0，lob逻辑读取0，lob物理读取0，lob预读读取0。表“#B131B1E5”。扫描计数1，逻辑读取1，物理读取0，预读读取0，lob逻辑读取0，lob物理读取0，lob预读读取0

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**

*注意：此解决方案将在SQL Server 2012及更高版本上运行

您好，感谢您的回复，当我使用上述脚本时，我在最后一个enddate列中得到Max（begindate），但我希望输出为Max（enddate）。您好，我尝试了此方法，它工作正常，但我想要的日期是Max（enddate）=2017年6月2日，但我对2019年3月31日的日期有点困惑，请您帮助检查我用样本数据更新的示例。您可能有一些您在问题中没有提到的附加条件。我已经添加了orderid条件，它现在应该可以工作了。

ID  OrderId StartDate   begindate   enddate      LastEnddate
1   2345    06/07/2011  20/08/2011  12/07/2012     NULL
2   2345    05/07/2012  11/07/2012  13/01/2014     NULL
3   2345    21/05/2014  28/10/2013  27/05/2015      NULL
4   2345    23/05/2015  03/06/2015  **02/06/2017**  NULL
5   2345    27/03/2017  20/06/2017  NULL           **02/06/2017**