解析SQL CAST XML

Question

我有一個XML列的表。 我想解析它在XML特定的鍵，我完成通過執行以下操作：

SELECT TOP 1000 
CAST([PlatformInfo] as xml).value('(/PlatformInfo/@Device)[1]', 'varchar(max)') as Device , 
CAST([PlatformInfo] as xml).value('(/PlatformInfo/@SDKv)[1]', 'varchar(max)') as SDKv 
FROM [myDB].[dbo].[HISTORY_TB] 

現在我想對它進行排序，我總是得到一個錯誤。 我怎麼能說我的設備和SDKv創建的自定義列進行排序？ 我如何按特定值對它進行分類？

感謝

Answer 1

Create table #companyname(name varchar(max)) 
Insert into #companyname (name) values 
('<name>US Concrete Inc</name>'), 
('<name>Digitiliti Inc</name>'), 
('<name>Printron Inc</name>'), 
('<name>Wesco Financial, LLC</name>'), 
('<name>Fusion Restaurant Group Inc</name>') 

select * from (
select top 4 CAST(name as xml).value('(/name)[1]','nvarchar(max)') as t 
from #companyname)tbl 
order by tbl.t 

同理：

Select * from (
    SELECT TOP 1000 
CAST([PlatformInfo] as xml).value('(/PlatformInfo/@Device)[1]', 'varchar(max)') as Device , 
CAST([PlatformInfo] as xml).value('(/PlatformInfo/@SDKv)[1]', 'varchar(max)') as SDKv 
FROM [myDB].[dbo].[HISTORY_TB]) dertbl 
order by dertbl.Device,dertbl.SDKv