Question

如何选择以逗号分隔并使用自定义格式（例如：x）

进行装饰的XML列表值

输入样本，它将有多行

1 |    <User Name="AAA" /><User Name="BBB" />
2 |    <User Name="CCC" /><User Name="DD" />

需要输出

1 | xAAAx,xBBBx      
2 | xCCCx,xDDDx

我的进步

DECLARE @xml XML
SELECT @xml = N'
<User Name="AAA"/>
<User Name="BBB"/>'

Declare @TempT TABLE (id int, data xml)

INSERT INTO @TempT VALUES (1,@xml)

set @xml  = N'
<User Name="CCC"/>
<User Name="DDD"/>'
INSERT INTO @TempT VALUES (2,@xml) 

SELECT * from @TempT

DECLARE @listStr VARCHAR(MAX)
SELECT @listStr = COALESCE(@listStr+', ' ,'') 
+ 'x'+T.C.value('@Name', 'nvarchar(50)') +'x' 
FROM @xml.nodes('User') T(C)
SELECT @listStr

Answer 1

declare @TempT table(data xml)

insert into @TempT (data) values
(N'<User Name="AAA"/><User Name="BBB"/><User Name="CCC"/>'),
(N'<User Name="CCC"/><User Name="DDD"/>');

select stuff((
             select ',x'+N.X.value('.', 'nvarchar(50)')+'x'
             from T.data.nodes('/User/@Name') as N(X)
             for xml path(''), type
             ).value('text()[1]', 'nvarchar(max)'), 1, 1, '')
from @TempT as T;

结果：

-------------------
xAAAx,xBBBx,xCCCx
xCCCx,xDDDx

Answer 2

Declare @TempT TABLE (id int, data xml)
insert into @TempT values (1, N'<User Name="AAA"/><User Name="BBB"/>');
insert into @TempT values (2, N'<User Name="CCC"/><User Name="DDD"/>');

SELECT * from @TempT;

select 'x' + data.value('(User/@Name)[1]', 'varchar(50)') + 'x,'
       + 'x' + data.value('(User/@Name)[2]', 'varchar(50)') + 'x'
from   @TempT 
GO

id | data                                  
-: | :-------------------------------------
 1 | <User Name="AAA" /><User Name="BBB" />
 2 | <User Name="CCC" /><User Name="DDD" />

| (No column name) |
| :--------------- |
| xAAAx,xBBBx      |
| xCCCx,xDDDx      |

dbfiddle here

SQL从XML列中选择格式化的输出

2 个答案: