SQL-如何在查询中直接更新XML列

我有一个

XML

列，其中包含以下值：

<Parameters>
    <Parameter lastweekran_start="2016-06-04 00:00:00" 
               lastweekran_end="2016-06-10 23:59:59" />
</Parameters>

我需要通过将每个值增加1周来更新属性

lastweekran\u start

和

lastweekran\u end

---

有没有关于如何在不创建新XML的情况下实现这一点的线索？

我发现了两种解决方案，它们都不是很优雅，但都很有效。
A） 使用T-sqlxmldml

declare @tbl table(id int, params xml)
insert @tbl values
(1,'<Parameters><Parameter lastweekran_start="2016-06-04 00:00:00" lastweekran_end="2016-06-10 23:59:59" /></Parameters>')
,(2,'<Parameters><Parameter lastweekran_start="2015-06-04 00:00:00" lastweekran_end="2015-06-10 23:59:59" /></Parameters>')

;with par as (--extract values and add 1 week
select id, dateadd(week,1,t.v.value('@lastweekran_start','datetime')) lastweekran_start ,
dateadd(week,1,t.v.value('@lastweekran_end','datetime')) lastweekran_end
from @tbl cross apply params.nodes('Parameters/Parameter') t(v)
)
update @tbl --and update using modify with replace value of
--1. lastweekran_start
set params.modify('replace value of (Parameters/Parameter/@lastweekran_start)[1]
     with sql:column("lastweekran_start")') 
--2. lastweekran_end
--set params.modify('replace value of (Parameters/Parameter/@lastweekran_end)[1]
--     with sql:column("lastweekran_end")')
from @tbl t inner join par on t.id=par.id

--The issue here is that replace value of allows single node at a time
--So the query must run twice for lastweekran_end
--Comment 1st set block and uncomment 2nd one

---

我发现了两种解决方案，它们都不是很优雅，但都很有效。
A） 使用T-sqlxmldml

declare @tbl table(id int, params xml)
insert @tbl values
(1,'<Parameters><Parameter lastweekran_start="2016-06-04 00:00:00" lastweekran_end="2016-06-10 23:59:59" /></Parameters>')
,(2,'<Parameters><Parameter lastweekran_start="2015-06-04 00:00:00" lastweekran_end="2015-06-10 23:59:59" /></Parameters>')

;with par as (--extract values and add 1 week
select id, dateadd(week,1,t.v.value('@lastweekran_start','datetime')) lastweekran_start ,
dateadd(week,1,t.v.value('@lastweekran_end','datetime')) lastweekran_end
from @tbl cross apply params.nodes('Parameters/Parameter') t(v)
)
update @tbl --and update using modify with replace value of
--1. lastweekran_start
set params.modify('replace value of (Parameters/Parameter/@lastweekran_start)[1]
     with sql:column("lastweekran_start")') 
--2. lastweekran_end
--set params.modify('replace value of (Parameters/Parameter/@lastweekran_end)[1]
--     with sql:column("lastweekran_end")')
from @tbl t inner join par on t.id=par.id

--The issue here is that replace value of allows single node at a time
--So the query must run twice for lastweekran_end
--Comment 1st set block and uncomment 2nd one

---

为了他们所有人？OPENXML是一种选择吗？还是仅仅通过XQUery？对所有人？OPENXML是一种选择吗？或者仅仅通过XQUery？你是一个勇敢的灵魂。有点创造性的荣誉。：）你是一个勇敢的人。有点创造性的荣誉。：）