Question

如果第一个参数失败/同一日期，我想添加第二个参数。我希望location是第二个参数，本例是“location a”。所以在这个例子中：

name             date       doc          info           location
=====================================================================
janedoe          7/21       jones        47                   a
jonwall          7/1        nick         21                   a

name            date      doc          info          location
=================================================================
janedoe          7/21       jones        74                  b
jonwall          8/31       hall         22                  b

结尾应该像这样

name             date          doc          info           location
=========================================================================
janedoe          7/21          jones         47                 a
jonwall          8/31          hall          22                 b

Need help combining columns from 2 tables and keep remaining data in rows based on parameters in sql

Answer 1

您需要编辑问题。通过回到原始问题的指针很难回溯并提供问题的答案。你应该提供一个完整的问题。但是，我会采取刺。使用作为上一个答案答案的查询，您需要将location desc或location asc添加到窗口函数的分区，以便在两个日期匹配时充当决胜局。

另外，请查看MERGE命令。它为类似的问题提供了更清晰的方法。

DECLARE @A TABLE(name NVARCHAR(20),date DATETIME,doc NVARCHAR(20),info NVARCHAR(20),location NVARCHAR(20))
DECLARE @B TABLE(name NVARCHAR(20),date DATETIME,doc NVARCHAR(20),info NVARCHAR(20),location NVARCHAR(20))

INSERT INTO @A SELECT 'janedoe','7/21/2017','jones','47','a'
INSERT INTO @A SELECT 'jonwall','7/1/2017','nick','21','a'
INSERT INTO @B SELECT 'janedoe','7/21/2017','jones','74','b'
INSERT INTO @B SELECT 'jonwall','8/31/2017','hall','22','b'

INSERT INTO @B SELECT 'janedoe','7/21/2017','jones','74','a'
INSERT INTO @B SELECT 'jonwall','8/31/2017','hall','22','c'

    ;WITH allRows AS (
         SELECT * FROM @A
         UNION ALL 
         SELECT * FROM @B
    ), mostRecent AS (
         SELECT *, 
                ROW_NUMBER() OVER 
                  (PARTITION BY name ORDER BY date DESC, location desc) as rn
         FROM allRows
    )
    SELECT *
    FROM mostRecent 
    WHERE rn = 1

需要帮助将第二个参数添加到组合列表中。

1 个答案: