在 powerquery-m 中使用 Html.Table 一次转换 2 列

Question

这是我的数据：

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSo0pNTAwMlO2NDWzVshNLcnIT1HSUYIJmphZ6xaXFJUml5QWpSrF6kQrJefnFZck5pUowJSYGVgja7CwNjR2BhqUWAzUkZuaV6IUGwsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [col1 = _t, col2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"col1", type text}, {"col2", type text}})
in
    #"Changed Type"

我知道如何使用 Html.Table 添加带有解码文本的列（添加了 2 行）：

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSo0pNTAwMlO2NDWzVshNLcnIT1HSUYIJmphZ6xaXFJUml5QWpSrF6kQrJefnFZck5pUowJSYGVgja7CwNjR2BhqUWAzUkZuaV6IUGwsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [col1 = _t, col2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"col1", type text}, {"col2", type text}}),
    HtmlTable = Table.AddColumn(#"Changed Type", "HtmlTable", each Html.Table([col1],{{"HtmlDecoded",":root"}})),
    #"Expanded HtmlTable" = Table.ExpandTableColumn(HtmlTable, "HtmlTable", {"HtmlDecoded"}, {"HtmlDecoded"})
in
    #"Expanded HtmlTable"

但是我可以同时使用两列吗？怎么样？

Answer 1

转换两列，甚至不添加新列：

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSo0pNTAwMlO2NDWzVshNLcnIT1HSUYIJmphZ6xaXFJUml5QWpSrF6kQrJefnFZck5pUowJSYGVgja7CwNjR2BhqUWAzUkZuaV6IUGwsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [col1 = _t, col2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"col1", type text}, {"col2", type text}}),
    Decoded = Table.TransformColumns(#"Changed Type", {
        {"col1", each Table.FirstValue(Html.Table(_,{{"t1",":root"}}))}, 
        {"col2", each Table.FirstValue(Html.Table(_,{{"t2",":root"}}))} } )
in
    Decoded

在 powerquery-m 中使用 Html.Table 一次转换 2 列

Transform 2 columns at once using Html.Table in powerquery-m

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