在sql server中查询xml需要帮助

时间:2011-06-01 06:09:10

标签: sql sql-server xml tsql

我在sql server 2005中有两个表。在一个表table1中有一列其数据类型为xml,我们以xml格式保存数据。现在我有另一个表table2,我们存储几个文件名。所以现在我想在这样的xml数据上写查询,这将返回table2中定义的那些字段值。如何使用简单的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中存储的字段很少 JID,WID,AccountReference,OEReference,InvoiceNumber。

所以请指导我如何在xml数据上编写sql,它只返回xml数据中的JID,WID,AccountReference,OEReference,InvoiceNumber,但是文件名不会被硬编码,而是从另一个表table2中获取。

请指导我。

1 个答案:

答案 0 :(得分:1)

要从xml读取数据,您可以像这样使用:

    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中的另一个表中读取指定的字段,并在不传递参数的情况下动态创建select语句。


[更新2]

您可以针对多个已删除的代码尝试此操作:

Select
Row.value('(./JID)[1]', 'int' ) as JID,
Row.value('(./WID)[1]', 'int' ) as WID,
Row.value('(./AccountReference)[1]', 'nvarchar(255)' ) as AccountReference 
from table2
CROSS APPLY MyXmlColumn.nodes('/Record/DELETED') as Record(Row)