SQL XML的查询操作

SQL XML的查询操作

 

查询XML节点 value：通过nodes 指定到节点通过Value属性取出值
Declare @Xml xml
set @Xml='<Employee><ID>1</ID><ID>2</ID></Employee>'

SELECT  ID.value('.','Nvarchar(500)') as EmployeeID
    FROM @Xml.nodes('Employee/ID') Employee(ID)            
    
查询 XML节点的属性：            
Declare @Xml xml
set @Xml='<Employee><EmployeeID ID="1" /><EmployeeID ID="2" /><EmployeeID ID="3" /></Employee>'
                
SELECT  EmployeeID.value('./@ID','Nvarchar(500)') as ReportColumnID
                
                FROM @Xml.nodes('/Employee/EmployeeID') 
                X(EmployeeID)

查询XML 多节点的值，可以通过子查询实现：
Declare @Xml xml
Set @Xml = '
<X>
  <T><ID>1</ID><NAME>A1</NAME></T>
  <T><ID>2</ID><NAME>B2</NAME></T>
  <T><ID>3</ID><NAME>C3</NAME></T>
</X>'
SELECT  ID.value('.', 'NVARCHAR(100)') As ID,NAME.value('.','NVARCHAR(100)') As NAME
FROM 
(
    Select  
        T.C.query('ID') As ID, 
        T.C.query('NAME') As NAME
    From 
        @Xml.nodes('/X/T') As T(C)
)BT



OPENXML 查询方式：

DECLARE @idoc int
DECLARE @doc varchar(1000)
SET @doc ='
<ROOT>
<Customer CustomerID="VINET" ContactName="Paul Henriot" />
</ROOT>'
---创建文档内部格式
EXEC sp_xml_preparedocument @idoc OUTPUT, @doc

SELECT    *
FROM       OPENXML (@idoc, '/ROOT/Customer',1)
            WITH (CustomerID  varchar(10),
                  ContactName varchar(20))


OPENXML 查询方式：

DECLARE @idoc int
DECLARE @doc varchar(1000)
SET @doc ='
<ROOT>
<Customer CustomerID="VINET" ContactName="Paul Henriot">
   <Order OrderID="10248" CustomerID="VINET" EmployeeID="5" OrderDate="1996-07-04T00:00:00">
      <OrderDetail ProductID="11" Quantity="12"/>
      <OrderDetail ProductID="42" Quantity="10"/>
   </Order>
</Customer>
</ROOT>'
---创建文档内部格式
EXEC sp_xml_preparedocument @idoc OUTPUT, @doc

SELECT *
FROM   OPENXML (@idoc, '/ROOT/Customer/Order/OrderDetail',2)
         WITH (OrderID       int         '../@OrderID',
               CustomerID  varchar(10) '../@CustomerID',
               OrderDate   datetime    '../@OrderDate',
               ProdID      int         '@ProductID',

               Qty         int         '@Quantity')