Question

我在SQL Server中有一个表Kwd_UploadRecored：

ID  Primary_Kwd                             Sec_Kwd                                         Main_Kwd
1   Man,One Man,architecture,Boy            Arrival,Sigle Man , Business Man ,Male          aspirations,One Person
2   Woman,attire,Girl                       Girl,Girls,Female,Blueprint,Carrying,           Teenage Girl,Only Girls
3   Grand father,Man,caucasian appearance   cheerful, Family,Fatherhood,Family Member,      Male Parent,
4   Baby ,clothes,color image               growth,Babies,Child,Happiness                   Children,Toddlers,differential focus,

我想从Primary_Kwd，Sec_kwd，Main_kwd中选择与此类似的数据：

Kwds
man
one man
architecture
boy
arrival
Single man
Business man
Male 
.
.
etc

我使用以下代码，但这仅适用于一列

SELECT DISTINCT
    Split.a.value('.', 'VARCHAR(100)') data
FROM   
    (SELECT 
         #temp.PM_AssetID,Cast ('<M>'
         + replace(Replace(#temp.Primary_kwd, ',', '</M><M>'),'&','&amp;')
         + '</M>' AS XML) AS Data 
     FROM #temp) AS A
CROSS APPLY 
    Data.nodes ('/M') AS Split(a)

DROP TABLE #temp

请帮我解决这个问题。提前谢谢。

Answer 1

您可以使用UNION删除重复项：

;WITH CtePrimary AS(
    SELECT
        LTRIM(RTRIM(s.Item)) AS Item
    FROM Kwd_UploadRecorded k
    CROSS APPLY dbo.DelimitedSplit8K(k.Primary_Kwd, ",") s
),
CteSec AS(
    SELECT
        LTRIM(RTRIM(s.Item)) AS Item
    FROM Kwd_UploadRecorded k
    CROSS APPLY dbo.DelimitedSplit8K(k.Sec_Kwd, ",") s
),
CteMain AS(
    SELECT
        LTRIM(RTRIM(s.Item)) AS Item
    FROM Kwd_UploadRecorded k
    CROSS APPLY dbo.DelimitedSplit8K(k.Main_Kwd, ",") s
)
SELECT * FROM CtePrimary UNION
SELECT * FROM CteSec UNION
SELECT * FROM CteMain

根据Turophile的评论，你可以通过在分割它们之前首先连接UNION来摆脱kwd。

SELECT DISTINCT
    LTRIM(RTRIM(s.Item)) AS Item
FROM Kwd_UploadRecorded k
CROSS APPLY dbo.DelimitedSplit8K(k.kPrimary_kwd + ',' + k.Sec_kwd + ',' + k.Main_kwd, ",") s

Answer 2

您必须创建Spit功能并使用Cross Aplly

主要查询

    SELECT Distinct T.ID
        ,S.Data
    FROM Kwd_UploadRecored AS T
    CROSS APPLY dbo.Split(isnull(T.Primary_Kwd+ ',','')  + isnull(Sec_Kwd+',','') + ',' + isnull(Main_Kwd+',' ,'') ) AS S
    WHERE S.Value > ''

拆分功能代码

CREATE FUNCTION [dbo].[Split]
(
    @RowData nvarchar(MAX),
    @SplitOn nvarchar(5)
)  
RETURNS @RtnValue table 
(
    Id int identity(1,1),
    Data varchar(8000)
) 
AS  
BEGIN 
    Declare @Cnt int
    Set @Cnt = 1

    While (Charindex(@SplitOn,@RowData)>0)
    Begin
        Insert Into @RtnValue (data)
        Select 
            Data = ltrim(rtrim(Substring(@RowData,1,Charindex(@SplitOn,@RowData)-1)))

        Set @RowData = Substring(@RowData,Charindex(@SplitOn,@RowData)+1,len(@RowData))
        Set @Cnt = @Cnt + 1
    End

    Insert Into @RtnValue (data)
    Select Data = ltrim(rtrim(@RowData))

    Return
END

Answer 3

你能试试吗

    Select * 
    from #temp
    cross apply fnSplit(Primary_Kwd,',')a
    where a.value > '' 
union all
    Select b.value 
    from #temp
    cross apply fnSplit(Sec_Kwd,',')b
    where b.value > '' 
union all
    Select c.value 
    from #temp
    cross apply fnSplit(Main_Kwd,',')c
    where c.Value > ''

如何在sql server中选择3列数据作为单列

3 个答案: