使用SQL Server XML Import添加索引

Posted 2021-04-21

在SQL Server中，我尝试使用XML函数导入文件，如下所示：

SELECT 
    file.value('@registrationnumber[1]', 'nvarchar(100)') AS [registrationnumber],
    report.value('@nihil[1]', 'nvarchar(100)') AS [nihil],
    report.value('@period[1]', 'nvarchar(100)') AS [period],
    report.value('@formulaid[1]', 'nvarchar(100)') AS [formulaid],
    report.value('@frequention[1]', 'nvarchar(100)') AS [frequention],
    report.value('@versieon[1]', 'nvarchar(100)') AS [version],
    variant.value('@type[1]', 'nvarchar(100)') AS [varianttype],
    variant.value('@value[1]', 'nvarchar(100)') AS [variantvalue],
    post.value('@cube[1]', 'nvarchar(100)') AS [cube],
    post.value('@row[1]', 'nvarchar(100)') AS [row],
    post.value('@rownr[1]', 'nvarchar(100)') AS [rownr],
INTO
    [#parsed]
FROM
    @xmlData.nodes('file') AS a(file)
CROSS APPLY
    file.nodes('report') AS b(report)
CROSS APPLY
    report.nodes ('post') AS c(post)
OUTER APPLY
    report.nodes ('variant') AS d(variant)

我想知道是否有可能为每个加载的报告自动添加一个带有唯一索引的附加列。

我无法在谷歌上找到解决方案，因为我认为我使用的是错误的搜索字词。

答案

使用ROW_NUMBER()：

SELECT 
    file.value('@registrationnumber[1]', 'nvarchar(100)') AS [registrationnumber],
    report.value('@nihil[1]', 'nvarchar(100)') AS [nihil],
    report.value('@period[1]', 'nvarchar(100)') AS [period],
    report.value('@formulaid[1]', 'nvarchar(100)') AS [formulaid],
    report.value('@frequention[1]', 'nvarchar(100)') AS [frequention],
    report.value('@versieon[1]', 'nvarchar(100)') AS [version],
    variant.value('@type[1]', 'nvarchar(100)') AS [varianttype],
    variant.value('@value[1]', 'nvarchar(100)') AS [variantvalue],
    post.value('@cube[1]', 'nvarchar(100)') AS [cube],
    post.value('@row[1]', 'nvarchar(100)') AS [row],
    post.value('@rownr[1]', 'nvarchar(100)') AS [rownr],
    ROW_NUMBER() OVER (ORDER BY (SELECT 1)) YourSequentialIndex
INTO
    [#parsed]
FROM
    @xmlData.nodes('file') AS a(file)
        CROSS APPLY
    file.nodes('report') AS b(report)
        CROSS APPLY
    report.nodes ('post') AS c(post)
        OUTER APPLY
    report.nodes ('variant') AS d(variant)