Sql server T-SQL：通过搜索同级（对等）更新特定的XML节点

我有如下XML，表示SQL表数据：

<Project>
    <DataSource version="4" type="LiveDatabaseSource">
        <ServerName>(local)</ServerName>
    </DataSource>
    <Tables>
        <value>
            <TableType>Generated</TableType>
            <PopulationDetails version="2" type="PopulationDetails">
                <PopulationType>RowCount</PopulationType>
                <RowCount>10000</RowCount>
                <ProportionTableExists>False</ProportionTableExists>
                <Proportion>0</Proportion>
                <TimeToPopulate>0</TimeToPopulate>
            </PopulationDetails>
            <Name>Table1</Name>
            <Schema>dbo</Schema>
        </value>
        <value>
            <TableType>Generated</TableType>
            <PopulationDetails version="2" type="PopulationDetails">
                <PopulationType>RowCount</PopulationType>
                <RowCount>10000</RowCount>
                <ProportionTableExists>False</ProportionTableExists>
                <Proportion>0</Proportion>
                <TimeToPopulate>0</TimeToPopulate>
            </PopulationDetails>
            <InvalidRowBehaviour>SkipRow</InvalidRowBehaviour>
            <Included>False</Included>
            <Append>False</Append>
            <Name>Table2</Name>
            <Schema>dbo</Schema>
        </value>
    </Tables>
</Project>

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有很多基于属性查找节点和更新值的示例，但不是这种类型的对等级搜索或我的google foo糟糕透顶。

以下是您要查找的内容

SQL

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这可能也有帮助：完美！我不理解它，因为在我看来，它仍然被视为处于等级制度之下，但它是有效的！值[Name=Table2]谓词在XQuery中的作用类似于SQL中的WHERE子句。

UPDATE dbo.SQLGenXML
SET GenXML.modify('replace value of 
(/Project/Tables/value/PopulationDetails/RowCount/text())    [1] with ("60000")')
WHERE id = 1;

-- DDL and sample data population, start
DECLARE @SQLGenXML TABLE (ID INT IDENTITY PRIMARY KEY, GenXML XML);
INSERT INTO @SQLGenXML (GenXML)
VALUES
(N'<Project>
    <DataSource version="4" type="LiveDatabaseSource">
        <ServerName>(local)</ServerName>
    </DataSource>
    <Tables>
        <value>
            <TableType>Generated</TableType>
            <PopulationDetails version="2" type="PopulationDetails">
                <PopulationType>RowCount</PopulationType>
                <RowCount>10000</RowCount>
                <ProportionTableExists>False</ProportionTableExists>
                <Proportion>0</Proportion>
                <TimeToPopulate>0</TimeToPopulate>
            </PopulationDetails>
            <Name>Table1</Name>
            <Schema>dbo</Schema>
        </value>
        <value>
            <TableType>Generated</TableType>
            <PopulationDetails version="2" type="PopulationDetails">
                <PopulationType>RowCount</PopulationType>
                <RowCount>10000</RowCount>
                <ProportionTableExists>False</ProportionTableExists>
                <Proportion>0</Proportion>
                <TimeToPopulate>0</TimeToPopulate>
            </PopulationDetails>
            <InvalidRowBehaviour>SkipRow</InvalidRowBehaviour>
            <Included>False</Included>
            <Append>False</Append>
            <Name>Table2</Name>
            <Schema>dbo</Schema>
        </value>
    </Tables>
</Project>');
-- DDL and sample data population, end

UPDATE @SQLGenXML
SET GenXML.modify('replace value of 
(/Project/Tables/value[Name="Table2"]/PopulationDetails/RowCount/text())[1] with ("60000")');

-- test
SELECT * FROM @SQLGenXML;