SQL Server中的查询XML字段

我正在使用SQLServer2008R2。我有表X和列XXML，结构如下

<rec>
  <set>
    <Raw CLOrderID="GGM-30-08/24/10" Rej="Preopen" Sym="A" Tm="06:36:29.524" />
  </set>
</rec>

---

这可以通过几个for xml调用来完成。如果存在/rec/set/Raw/@*的话，此结构对于将来的模式更改也保持灵活。如果这种情况发生变化，则始终可以为要获取的属性添加具有新路径的管道。希望这有帮助

declare @x table (id int identity(1,1) primary key, x xml)
insert into @x (x) values ('<rec>
  <set>
    <Raw CLOrderID="GGM-30-08/24/10" Rej="Preopen" Sym="A" Tm="06:36:29.524" />
  </set>
</rec>')
select a.id, cast((
    select (
        select x.attribs.value('local-name(.)','nvarchar(20)') + ' '
        from @x t
            outer apply t.x.nodes('/rec/set/Raw/@*') x(attribs)
        where t.id = a.id
        for xml path('')
        ), (
        select x.attribs.value('.','nvarchar(20)') + ' '
        from @x t
            outer apply t.x.nodes('/rec/set/Raw/@*') x(attribs)
        where t.id = a.id
        for xml path('')
        )
    for xml path('')
) as varchar(500))
from @x a

使用节点分解XML并提取属性值

选择T.X.value'@CLOrderID'，nvarchar100'作为CLOrderID， T.X.值“@Rej”，“nvarchar100”为Rej， T.X.值'@Sym'，nvarchar100'为Sym， T.X.值'@Tm'，时间3'为Tm 来自dbo.X 交叉应用X.XXML.nodes'/rec/set/Raw'作为发送 如果确定每个XML只提取一行，则可以直接获取属性值，而无需先分解

选择X.XXML.value“/rec/set/Raw/@CLOrderID[1]”，选择“nvarchar100”作为CLOrderID， X.XXML.value'/rec/set/Raw/@Rej[1]，'nvarchar100'作为Rej， X.XXML.value'/rec/set/Raw/@Sym[1]，'nvarchar100'作为Sym， X.XXML.value'/rec/set/Raw/@Tm[1]，'time3'作为Tm 来自dbo.X

---

XML结构是否总是相同的？意思是，/rec/set/Raw和这4个属性CLOrderID、Rej、Sym和Tm？如果是这样，这应该相当简单。

declare @x table (id int identity(1,1) primary key, x xml)
insert into @x (x) values ('<rec>
  <set>
    <Raw CLOrderID="GGM-30-08/24/10" Rej="Preopen" Sym="A" Tm="06:36:29.524" />
  </set>
</rec>')
select a.id, cast((
    select (
        select x.attribs.value('local-name(.)','nvarchar(20)') + ' '
        from @x t
            outer apply t.x.nodes('/rec/set/Raw/@*') x(attribs)
        where t.id = a.id
        for xml path('')
        ), (
        select x.attribs.value('.','nvarchar(20)') + ' '
        from @x t
            outer apply t.x.nodes('/rec/set/Raw/@*') x(attribs)
        where t.id = a.id
        for xml path('')
        )
    for xml path('')
) as varchar(500))
from @x a