Question

我有一个连接到3个表的查询。没有＆＃34; DISTINCT＆＃34;总记录是331，但是Distinct总数是113.我想得到113总数，这是不同记录的总数。我使用了Count但是它给了我不唯一记录的总数。请帮我搞清楚不同的记录。这是我的疑问。

没有明显（331条记录）

SELECT  
uf.OrigFileName,
uf.CreatedOn,
sdiTran.Status,
sdiFS.FileName,
sdiFile.ArchiveLogID,
COUNT(*) over() as totalRows
FROM [SDI].dbo.UploadedFile uf 
inner join [SDI].dbo.SDIFile sdiFile on uf.UploadedFullFileName = sdiFile.OriginalName 
left join [SDI].dbo.SDITransaction sdiTran on sdiFile.ID = sdiTran.SDIFileID 
inner join [SDI].dbo.SDIFSArchive sdiFS on sdiFile.ID = sdiFS.SDIFileID
WHERE uf.CommunityID = '7cc67de8-e5c2-4055-958b-f604c6a40cf1' 
AND uf.OrganizationID='e5750df1-0409-46b6-9aba-7f07be7c890c'

After Distinct（113条记录）。 totalRows应该只有113，因为我得到的是不同的记录。

SELECT distinct
uf.OrigFileName,
uf.CreatedOn,
sdiTran.Status,
sdiFS.FileName,
sdiFile.ArchiveLogID,
COUNT(*) over() as totalRows
FROM [SDI].dbo.UploadedFile uf 
inner join [SDI].dbo.SDIFile sdiFile on uf.UploadedFullFileName = sdiFile.OriginalName 
left join [SDI].dbo.SDITransaction sdiTran on sdiFile.ID = sdiTran.SDIFileID 
inner join [SDI].dbo.SDIFSArchive sdiFS on sdiFile.ID = sdiFS.SDIFileID
WHERE uf.CommunityID = '7cc67de8-e5c2-4055-958b-f604c6a40cf1' 
AND uf.OrganizationID='e5750df1-0409-46b6-9aba-7f07be7c890c'

Answer 1

您可以在子查询中使用distinct：

SELECT *
    , COUNT(*) over() as totalRows
FROM (
    SELECT DISTINCT
    uf.OrigFileName,
    uf.CreatedOn,
    sdiTran.Status,
    sdiFS.FileName,
    sdiFile.ArchiveLogID
    FROM [SDI].dbo.UploadedFile uf 
    inner join [SDI].dbo.SDIFile sdiFile on uf.UploadedFullFileName = sdiFile.OriginalName 
    left join [SDI].dbo.SDITransaction sdiTran on sdiFile.ID = sdiTran.SDIFileID 
    inner join [SDI].dbo.SDIFSArchive sdiFS on sdiFile.ID = sdiFS.SDIFileID
    WHERE uf.CommunityID = '7cc67de8-e5c2-4055-958b-f604c6a40cf1' 
    AND uf.OrganizationID='e5750df1-0409-46b6-9aba-7f07be7c890c'
) A

Answer 2

如果你想在每一行中拥有331行，每次计数为113，你可以使用技巧。使用row_number()枚举具有相同值的行，然后使用窗口函数计算数字为1时的行：

SELECT t.*,
       SUM(CASE WHEN seqnum = 1 THEN 1 ELSE 0 END) OVER () as CountDistinct
FROM (SELECT uf.OrigFileName, uf.CreatedOn, sdiTran.Status, sdiFS.FileName, 
             sdiFile.ArchiveLogID,
             ROW_NUMBER() OVER (PARTITION BY uf.OrigFileName, uf.CreatedOn, sdiTran.Status, sdiFS.FileName, sdiFile.ArchiveLogID
                              ORDER BY (SELECT NULL)) as seqnum
      FROM [SDI].dbo.UploadedFile uf inner join
           [SDI].dbo.SDIFile sdiFile
           on uf.UploadedFullFileName = sdiFile.OriginalName left join
           [SDI].dbo.SDITransaction sdiTran
           on sdiFile.ID = sdiTran.SDIFileID inner join
           [SDI].dbo.SDIFSArchive sdiFS on sdiFile.ID = sdiFS.SDIFileID
      WHERE uf.CommunityID = '7cc67de8-e5c2-4055-958b-f604c6a40cf1' AND
            uf.OrganizationID='e5750df1-0409-46b6-9aba-7f07be7c890c'
     ) t;

如果您只想要记录不同的记录，可以使用COUNT(DISTINCT)。因为SQL Server不允许多个参数，所以子查询可能是最简单的方法：

SELECT COUNT(*)
FROM (SELECT DISTINCT uf.OrigFileName, uf.CreatedOn, sdiTran.Status, sdiFS.FileName, 
             sdiFile.ArchiveLogID
      FROM [SDI].dbo.UploadedFile uf inner join
           [SDI].dbo.SDIFile sdiFile
           on uf.UploadedFullFileName = sdiFile.OriginalName left join
           [SDI].dbo.SDITransaction sdiTran
           on sdiFile.ID = sdiTran.SDIFileID inner join
           [SDI].dbo.SDIFSArchive sdiFS on sdiFile.ID = sdiFS.SDIFileID
      WHERE uf.CommunityID = '7cc67de8-e5c2-4055-958b-f604c6a40cf1' AND
            uf.OrganizationID='e5750df1-0409-46b6-9aba-7f07be7c890c'
     ) t;

Answer 3

在count（）函数中使用distinct与唯一列，例如 select count（DISTINCT columnName）作为计数。并且不要使用over（）子句虽然得到了明显的计数。

列表项

SELECT  
uf.OrigFileName ,
uf.CreatedOn,
sdiTran.Status,
sdiFS.FileName,
sdiFile.ArchiveLogID,
COUNT(DISTINCT uf.OrigFileName) as totalRows
FROM [SDI].dbo.UploadedFile uf 
inner join [SDI].dbo.SDIFile sdiFile on uf.UploadedFullFileName = sdiFile.OriginalName 
left join [SDI].dbo.SDITransaction sdiTran on sdiFile.ID = sdiTran.SDIFileID 
inner join [SDI].dbo.SDIFSArchive sdiFS on sdiFile.ID = sdiFS.SDIFileID
WHERE uf.CommunityID = '7cc67de8-e5c2-4055-958b-f604c6a40cf1' 
AND uf.OrganizationID='e5750df1-0409-46b6-9aba-7f07be7c890c'

获取不同SQL Server之后的记录总数

3 个答案:

列表项