Mengimpor XML ke SQL Server tetapi mencoba membuat banyak entri jika ada beberapa hasil untuk elemen turunan

Ini akan membuat Anda cukup jauh. Ini benar-benar belum teruji, jadi harap baca kodenya, pahami, dan buat perubahan yang sesuai untuk membuatnya berfungsi.

Saya telah menghapus function dan memasukkan semua kode ke dalam loop sebagai gantinya, fungsinya terlalu besar untuk selera saya. Sekarang Anda seharusnya dapat melihat lebih jelas apa yang terjadi.

Secara efektif ini adalah kode yang sama persis dua kali, dengan langkah ekstra kecil yang menambahkan referensi sendiri sehingga Anda dapat menanyakan setiap produk melalui ID primer dan ID sekundernya dengan cara yang sama, seperti yang dibahas dalam komentar.

$connectionString = "Data Source=Apps2\Apps2;Initial Catalog=ICECAT;Integrated Security=SSPI"
$batchSize = 50000

# set up [files_index] datatable & read schema from DB
$files_index_table = New-Object System.Data.DataTable
$files_index_adapter = New-Object System.Data.SqlClient.SqlDataAdapter("SELECT * FROM files_index WHERE 0 = 1", $connectionString)
$files_index_adapter.Fill($files_index_table) | Out-Null
$files_index_bcp = New-Object SqlBulkCopy($connectionString)
$files_index_bcp.DestinationTableName = "dbo.files_index"
$files_index_count = 0

# set up [product_ids] datatable & read schema from DB
$product_ids_table = New-Object System.Data.DataTable
$product_ids_adapter = New-Object System.Data.SqlClient.SqlDataAdapter("SELECT * FROM product_ids WHERE 0 = 1", $connectionString)
$product_ids_adapter.Fill($product_ids_table) | Out-Null
$product_ids_bcp = New-Object System.Data.SqlClient.SqlBulkCopy($connectionString)
$product_ids_bcp.DestinationTableName = "dbo.product_ids"
$product_ids_count = 0

# main import loop
$xmlReader = New-Object System.Xml.XmlTextReader("C:\Scripts\icecat\files.index.xml")
while ($xmlReader.Read()) {
    # skip any XML nodes that aren't elements
    if ($xmlReader.NodeType -ne [System.Xml.XmlNodeType]::Element) { continue }

    # handle <file> elements
    if ($xmlReader.Name -eq "file") {
        $files_index_count++

        # remember current product ID, we'll need it when we hit the next <M_Prod_ID> element
        $curr_product_id = $xmlReader.GetAttribute("Product_ID")
        $is_new_file = $true

        $newRow = $files_index_table.NewRow()
        $newRow["Product_ID"] = $xmlReader.GetAttribute("Product_ID")
        $newRow["path"] = $xmlReader.GetAttribute("path")
        $newRow["Updated"] = $xmlReader.GetAttribute("Updated")
        $newRow["Quality"] = $xmlReader.GetAttribute("Quality")
        $newRow["Supplier_id"] = $xmlReader.GetAttribute("Supplier_id")
        $newRow["Prod_ID"] = $xmlReader.GetAttribute("Prod_ID")
        $newRow["Catid"] = $xmlReader.GetAttribute("Catid")
        $newRow["On_Market"] = $xmlReader.GetAttribute("On_Market")
        $newRow["Model_Name"] = $xmlReader.GetAttribute("Model_Name")
        $newRow["Product_View"] = $xmlReader.GetAttribute("Product_View")
        $newRow["HighPic"] = $xmlReader.GetAttribute("HighPic")
        $newRow["HighPicSize"] = $xmlReader.GetAttribute("HighPicSize")
        $newRow["HighPicWifiles_index_tableh"] = $xmlReader.GetAttribute("HighPicWifiles_index_tableh")
        $newRow["HighPicHeight"] = $xmlReader.GetAttribute("HighPicHeight")
        $newRow["Date_Added"] = $xmlReader.GetAttribute("Date_Added")
        $files_index_table.Rows.Add($newRow) | Out-Null

        if ($files_index_table.Rows.Count -eq $batchSize) {
            $files_index_bcp.WriteToServer($files_index_table)
            $files_index_table.Rows.Clear()
            Write-Host "$files_index_count <file> elements processed so far"
        }
    # handle <M_Prod_ID> elements
    } elseif ($xmlReader.Name -eq "M_Prod_ID") {
        $product_ids_count++

        # add self-reference row to the [product_ids] table
        # only for the first <M_Prod_ID> per <file> we need to do this
        if ($is_new_file) {
            $newRow = $product_ids_table.NewRow()
            $newRow["Product_ID"] = $curr_product_id  # from above
            $newRow["Alternative_ID"] = $curr_product_id
            $product_ids_table.Rows.Add($newRow) | Out-Null
            $is_new_file = $false
        }

        $newRow = $product_ids_table.NewRow()
        $newRow["Product_ID"] = $curr_product_id  # from above
        $newRow["Alternative_ID"] = $xmlReader.Value
        $product_ids_table.Rows.Add($newRow) | Out-Null

        if ($product_ids_table.Rows.Count -eq $batchSize) {
            $product_ids_bcp.WriteToServer($files_index_table)
            $product_ids_table.Rows.Clear()
            Write-Host "$product_ids_count <M_Prod_ID> elements processed so far"
        }
    }
}

# write any remaining rows to the server
if ($files_index_table.Rows.Count -gt 0) {
    $files_index_bcp.WriteToServer($files_index_table)
    $files_index_table.Rows.Clear()
}
Write-Host "$files_index_count <file> elements processed overall"

if ($product_ids_table.Rows.Count -gt 0) {
    $product_ids_bcp.WriteToServer($product_ids_table)
    $product_ids_table.Rows.Clear()
}
Write-Host "$product_ids_count <M_Prod_ID> elements processed overall"