與where子句的SQL Server

Question

我在SQL Server中的XML存儲與結構如下選擇XML元素：

<ecHeaderData> 
    <FirstVersionSource>System1</FirstVersionSource> 
    <DMSEntryUserID>jsmith</DMSEntryUserID> 
</ecHeaderData> 

我想返回所有行DMSEntryUserID不是空白。我想在查詢中選擇FirstVersionSource和DMSEntryuserID。

事情是這樣的：

select deal_jacket_xml('/ecHeader/FirstVersionSource') as FirstVersionSource, 
deal_jacket_xml('/ecHeader/DMSEntryUserID') as DMSEntryUserID 
from deal_jacket_xml 
where deal_jacket_xml('NotBlank(/ecHeader/DMSEntryUserID'))=1 
order by [deal_jacket_xml_id] desc 

Answer 1

這裏是我想出了。關鍵是[1]的括號和索引規格：

select distinct deal_jacket_xml.value('(/eContractingData/ecHeaderData/FirstVersionSource)[1]', 'nvarchar(max)') as FirstVersionSource 
from deal_jacket_xml 
where deal_jacket_xml.value('(/eContractingData/ecHeaderData/FirstVersionSource)[1]', 'nvarchar(max)') is not null 
AND deal_jacket_xml.value('(/eContractingData/ecHeaderData/DMSEntryUserID)[1]', 'nvarchar(max)') is not null