问题描述
|
我在sql server 2005中有两个表。在一个表table1中,有一列的数据类型为xml,我们将数据保存为xml格式。现在我有另一个表table2,我们在其中存储了几个文件名。所以现在我想在此类xml数据上编写查询,这将返回table2中定义的那些字段值。如何用简单的sql语句而不是存储过程来实现它。
我的xml结构和数据如下
<Record xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">
<DELETED>
<JID>41185</JID>
<WID>0</WID>
<AccountReference>LH169</AccountReference>
<OEReference>Ari002</OEReference>
<InvoiceNumber>0</InvoiceNumber>
<OrderPlacedBy>Mark Catterall</OrderPlacedBy>
<Specialist>0FFICINA MottAUTO</Specialist>
<Priority>2</Priority>
<JobType>OUR</JobType>
<JobState>NOTSTARTED</JobState>
<JobAddedDate>2011-05-31T16:17:00</JobAddedDate>
<JobStartedDate>2011-05-31T16:18:00</JobStartedDate>
<JobFinishedDate>1777-01-01T00:00:01</JobFinishedDate>
<JobShippedDate>1777-01-01T00:00:01</JobShippedDate>
<RecievedDate>1777-01-01T00:00:01</RecievedDate>
<UPSShippingNumber />
<CustomerName>02 IRELAND</CustomerName>
<ContactName>ALAN CONLAN</ContactName>
<Telephone>00353868377926</Telephone>
<StandardHours>3.00</StandardHours>
<JobDescription>test for search 2</JobDescription>
<UserName xsi:nil=\"true\" />
<AwaitingCustomer>0</AwaitingCustomer>
<ReturnToCore>0</ReturnToCore>
<AwaitingFromSalvage>0</AwaitingFromSalvage>
<PartDescription>test for search 2</PartDescription>
<PostalCode>IRELAND</PostalCode>
<OURPrice xsi:nil=\"true\" />
<ExchangePrice xsi:nil=\"true\" />
<NewPrice xsi:nil=\"true\" />
<eBayPrice xsi:nil=\"true\" />
<Status>UPDATED</Status>
</DELETED>
</Record>
假设在我的table2中存储了一些字段,例如
JID,WID,AccountReference,OEReference,发票编号。
因此,请指导我如何在xml数据上编写sql,该数据将仅从xml数据返回JID,WID,AccountReference,OEReference,InvoiceNumber,但文件名不会被硬编码,而是会从另一个表table2中获取。
请指导我。
解决方法
要从xml读取数据,您可以这样使用:
Select
MyXmlColumn.value(\'(Record/DELETED/JID)[1]\',\'int\' ) as JID,MyXmlColumn.value(\'(Record/DELETED/WID)[1]\',\'int\' ) as WID,MyXmlColumn.value(\'(Record/DELETED/AccountReference)[1]\',\'nvarchar(255)\' ) as AccountReference from table2
[更新]
使用您的参数创建一个存储过程:
create procedure getmyxmldata
(
@param1 varchar(50),@param2 varchar(50)
)
as
begin
declare @myQuery varchar(1000);
set @myQuery = \'Select
MyXmlColumn.value(\'\'(Record/DELETED/\' + @param1 + \')[1]\'\',\'\'nvarchar(255)\'\' ) as \' + @param1 + \',MyXmlColumn.value(\'\'(Record/DELETED/\' + @param1 + \')[1]\'\',\'\'nvarchar(255)\'\' ) as \' + @param1 + \' from table2\';
EXEC sp_executesql @myQuery
end
也可以从此存储过程的另一个表中读取指定的字段,并动态创建您的select语句,而无需传递参数。
[更新2]
您可以对多个已删除的标签进行尝试:
Select
Row.value(\'(./JID)[1]\',Row.value(\'(./WID)[1]\',Row.value(\'(./AccountReference)[1]\',\'nvarchar(255)\' ) as AccountReference
from table2
CROSS APPLY MyXmlColumn.nodes(\'/Record/DELETED\') as Record(Row)