Question

请考虑这个XML：

<Employees>
    <Person>
        <ID>1000</ID>
        <Name>Nima</Name>
        <LName>Agha</LName>
    </Person>
    <Person>
        <ID>1001</ID>
        <Name>Ligha</Name>
        <LName>Ligha</LName>
    </Person>
    <Person>
        <ID>1002</ID>
        <Name>Jigha</Name>
        <LName>Jigha</LName>
    </Person>
    <Person>
        <ID>1003</ID>
        <Name>Aba</Name>
        <LName>Aba</LName>
    </Person>
</Employees>

我想编写一个获取数字的过程然后将元素插入第n个Person元素。例如，如果1传递给我的程序，我将元素插入第一个人元素。

Answer 1

DECLARE @AttributeValue NVARCHAr(100) = 'TestValue';
DECLARE @NodeNR INT = 3
DECLARE @XML XML = '<Employees>
    <Person>
        <ID>1000</ID>
        <Name>Nima</Name>
        <LName>Agha</LName>
    </Person>
    <Person>
        <ID>1001</ID>
        <Name>Ligha</Name>
        <LName>Ligha</LName>
    </Person>
    <Person>
        <ID>1002</ID>
        <Name>Jigha</Name>
        <LName>Jigha</LName>
    </Person>
    <Person>
        <ID>1003</ID>
        <Name>Aba</Name>
        <LName>Aba</LName>
    </Person>
</Employees>';
SET @XML.modify('insert attribute Attribute {sql:variable("@AttributeValue")} into (/Employees/Person[position()=sql:variable("@NodeNr")])[1]')

Answer 2

DECLARE @data XML =
'
<Employees>
    <Person>
        <ID>1000</ID>
        <Name>Nima</Name>
        <LName>Agha</LName>
    </Person>
    <Person>
        <ID>1001</ID>
        <Name>Ligha</Name>
        <LName>Ligha</LName>
    </Person>
    <Person>
        <ID>1002</ID>
        <Name>Jigha</Name>
        <LName>Jigha</LName>
    </Person>
    <Person>
        <ID>1003</ID>
        <Name>Aba</Name>
        <LName>Aba</LName>
    </Person>
</Employees>
'

DECLARE @offset INT = 2
DECLARE @value VARCHAR(100) = 'newvalue'

SET @data.modify('insert <NewAttribute>{sql:variable("@value")}</NewAttribute> as last into (/Employees/Person)[sql:variable("@offset")][1]')

SELECT @data

Answer 3

试试这个 -

DECLARE @Param INT = 1000
DECLARE @NodeID INT = 2

DECLARE @XML XML = '
<Employees>
    <Person>
        <ID>1000</ID>
        <Name>Nima</Name>
        <LName>Agha</LName>
    </Person>
    <Person>
        <ID>1001</ID>
        <Name>Ligha</Name>
        <LName>Ligha</LName>
    </Person>
    <Person>
        <ID>1002</ID>
        <Name>Jigha</Name>
        <LName>Jigha</LName>
    </Person>
    <Person>
        <ID>1003</ID>
        <Name>Aba</Name>
        <LName>Aba</LName>
    </Person>
</Employees>'

DECLARE @SQL NVARCHAR(MAX) = '

DECLARE @XML XML = @XML_Param
DECLARE @Id INT = @Value_Param

SET @XML.modify(''insert attribute Id {sql:variable("@Id")} into (/Employees/Person)[' + CAST(@NodeID AS VARCHAR) + ']'')

SELECT @XML_Output = @XML'

DECLARE @Definition NVARCHAR(500) = 
    N'@XML_Param XML, @Value_Param INT, @Node_Param INT, @XML_Output XML OUTPUT'

DECLARE @XMLResult XML

EXEC sys.sp_executesql
      @SQL
    , @Definition
    , @XML_Param = @XML
    , @Value_Param = @Param
    , @Node_Param = 1
    , @XML_Output = @XMLResult OUTPUT

SELECT @XMLResult

在Sql Server的xml中向第n个元素插入一个元素

3 个答案: