Question

我正在使用MS-SQLServer-2016，并要求将行转置为列。我正在使用Pivot和动态SQL选项来执行此操作，因为行数是动态的。图1是我目前得到的输出。但是，客户端不希望显示这些NULL。他只希望显示Not-Null日期。有没有办法摆脱那些空值并只显示不同的日期？

Figure1-Transpose_Output

关心，

坦哈

DECLARE @columns AS NVARCHAR(MAX), @sql AS NVARCHAR(MAX), @var1 AS 
VARCHAR(MAX); 

SELECT @columns = stuff((select DISTINCT ',' + quotename(replace(replace(replace(n.action_note,' ','<>'),'><',''),'<>',' ') )
                         from engagement_action n, action_party m, personal p
                         where n.action_id = m.action_id
                           and p.party_id = m.party_id
                           and n.action_note like 'XXX'
                           and m.system_name = 'XXXXXXXXXXXX'
                           and p.customer_number = 'XXXXXXX' FOR XML PATH(''),TYPE).value('.','NVARCHAR(MAX)'),1,1,'')

SELECT @sql =

              'select "RANK_IN_PROP" ,
               customer_number, 
               customer_shortname, 
               system_name,
               '+ @columns + '
               from
                   (SELECT RANK() OVER (PARTITION BY convert(date,m.created_when) ORDER BY convert(date,m.created_when))"RANK_IN_PROP" ,
                          p.customer_number,
                          p.customer_shortname, 
                          m.system_name,
                          m.created_when ,
                          convert(date,m.created_when) as created_when, 
                          replace(replace(replace(n.action_note,'' '',''<>''),''><'',''''),''<>'','' '') as action_note1 
                   FROM engagement_action n, action_party m, personal p
                  WHERE n.action_id = m.action_id
                    AND p.party_id = m.party_id
                    AND n.action_note like ''%XXX%'' 
                    AND m.system_name = ''XXXXXXXXXXX''
                    AND p.customer_number = ''XXXXXXXX'' ) d
                  PIVOT 
                     (max(created_when) for action_note1 in ( ' + @columns + ' ))p order by created_when desc'

execute(@sql);`

Answer 1

你可以尝试这个，只是在where子句中添加（选择不同的action_note engagement_action，其中action_note不为null）。因为我无法创建测试数据，因此无法真正执行查询

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Microsoft SQL Server使用PiVOT行转换为列转置

1 个答案: