sql 多行一行 互转

Posted 2021-01-03 真的勇士，敢于直面惨淡的warning、敢于正视淋漓的err

原始数据：

期望数据：

1 IF OBJECT_ID(\'temp_20170701\',\'u\') IS NOT NULL DROP TABLE temp_20170701
2 
3  CREATE TABLE temp_20170701 (
4  ID INT PRIMARY KEY IDENTITY(1,1),
5  NAME  NVARCHAR(50),
6  Subjectname NVARCHAR(50),
7  Score INT
8  )

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 1 INSERT dbo.temp_20170701( Name, subjectname, Score )
 2 SELECT \'A\',\'语文\',\'20\' UNION
 3 SELECT \'A\',\'数学\',\'30\' UNION
 4 SELECT \'A\',\'英语\',\'40\' UNION
 5 SELECT \'B\',\'语文\',\'50\' UNION
 6 SELECT \'B\',\'数学\',\'60\' UNION
 7 SELECT \'B\',\'英语\',\'70\' UNION
 8 SELECT \'C\',\'语文\',\'80\' UNION
 9 SELECT \'C\',\'数学\',\'90\' UNION
10 SELECT \'C\',\'英语\',\'100\' UNION
11 SELECT \'D\',\'英语\',\'100\'

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1 SELECT Name ,Score=STUFF((SELECT \',\'+CONVERT(NVARCHAR(max),Score) FROM temp_20170701 t1 WHERE t1.NAME=t2.NAME FOR XML PATH(\'\')),1,1,\'\')
2 FROM temp_20170701 t2 GROUP BY t2.NAME

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原始数据：

期望数据：

 

1 CREATE TABLE temp_20170702 (
2 ID INT PRIMARY KEY IDENTITY(1,1),
3 NAME NVARCHAR(50),
4 Score varchar(100)
5 )

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1 insert temp_20170702 (Name,Score)
2 select \'A\',\'30,40,20\' union
3 select \'B\',\'60,70,50\' union
4 select \'C\',\'90,100,80\' union
5 select \'D\',\'100\'

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1 select a.NAME,b.value as Score from (
2 select *,s=CONVERT(xml,\'<root><v>\'+REPLACE(Score,\',\',\'</v><v>\')+\'</v></root>\') from temp_20170702 
3 ) a outer apply 
4 (select value=n.s.value(\'.\',\'varchar(100)\') from a.s.nodes(\'/root/v\') n(s)) b

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