SQL 更新查询以根据 xml 节点值更新记录中的 xml? [英] SQL Update query to update xml in records based on xml node value?
本文介绍了SQL 更新查询以根据 xml 节点值更新记录中的 xml?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一列 ntext 数据类型而不是 XML.它存储所有 xml 数据.我需要更新记录中的 xml 节点.它抛出一个错误,指出不正确使用 xml 数据类型方法‘修改’.在这种情况下需要一个非变异方法."
I have a column of ntext data type and NOT XML. It stores all xml data. I need to update xml node in the records. It throws an error saying "Incorrect use of the xml data type method 'modify'. A non-mutator method is expected in this context."
begin transaction
declare @Cps_Id int;
set @Cps_Id = 236;
declare @Cps_Message nvarchar(1024);
set @Cps_Message = 'updating cpsia message with smoking';
update table_name
set column_name = CONVERT(xml,column_name).modify('replace value of (/root/ProductInformation/CPSIA/CpsiaDetails/Item[CpsiaId=sql:variable("@Cps_Id")]/CpsiaMessage/text())[1] with sql:variable("@Cps_Message")')
WHERE Convert(xml,column_name).exist('/root/ProductInformation/CPSIA/CpsiaDetails/Item[CpsiaId=sql:variable("@Cps_Id")]')=1
rollback
示例 XML:
<root>
<ProductInformation>
<Name> Truck with Battery Charger</Name>
<Description>Fr.</Description>
<CPSIA>
<CpsiaDetails>
<Item>
<CpsiaId>456</CpsiaId>
<CpsiaMessage>waring</CpsiaMessage>
</Item>
<Item>
<CpsiaId>236</CpsiaId>
<CpsiaMessage>to health</CpsiaMessage>
</Item>
</CpsiaDetails>
</CPSIA>
</ProductInformation>
</root>
推荐答案
您需要对 XML 数据类型使用 modify 方法.
You need to use the modify method on the XML data type.
begin transaction
declare @Cps_Id int;
set @Cps_Id = 236;
declare @Cps_Message nvarchar(1024);
set @Cps_Message = 'updating cpsia message with smoking';
select id, CONVERT(xml,[text]) txt into #tmp from SO5954359
select * from #tmp
update #tmp
set txt.modify('replace value of (/root/ProductInformation/CPSIA/CpsiaDetails/Item[CpsiaId=sql:variable("@Cps_Id")]/CpsiaMessage/text())[1] with sql:variable("@Cps_Message")')
select * from #tmp
drop table #tmp
rollback
然后,您可以通过将更新后的临时表连接到键上的原始表来更新原始表.
You could then update the original table by joining the updated temporary table to the original table on the key.
这篇关于SQL 更新查询以根据 xml 节点值更新记录中的 xml?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文