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DECLARE @TempTable table(UserID int , UserName nvarchar(50));
insert into @TempTable (UserID,UserName) values (1,'a')
insert into @TempTable (UserID,UserName) values (2,'b')
 
select UserID,UserName from @TempTable FOR XML PATH
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<row>
  <UserID>1</UserID>
  <UserName>a</UserName>
</row>
<row>
  <UserID>2</UserID>
  <UserName>b</UserName>
</row>
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select UserID,UserName from @TempTable FOR XML PATH('lzy')
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<lzy>
  <UserID>1</UserID>
  <UserName>a</UserName>
</lzy>
<lzy>
  <UserID>2</UserID>
  <UserName>b</UserName>
</lzy>
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select UserID,UserName from @TempTable FOR XML PATH('')
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<UserID>1</UserID>
<UserName>a</UserName>
<UserID>2</UserID>
<UserName>b</UserName>
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select CAST(UserID AS varchar) + '',UserName + '' from @TempTable FOR XML PATH('')
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1a2b
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select CAST(UserID AS varchar) + ',',UserName + '',';' from @TempTable FOR XML PATH('')
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1,a;2,b;
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select '{' + CAST(UserID AS varchar) + ',','"' +UserName + '"','}' from @TempTable FOR XML PATH('')
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{1,"a"}{2,"b"}
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