从 Power BI 桌面/查询中的单元格中提取短语

Question

我对 Power BI 完全陌生，对那个工具有点迷茫。

我正在尝试从具有很长字符串的单元格中提取短语。 我尝试提取的每个短语都以“DI”开头，后跟 4 个随机数，因此格式为 DIXXXX。 每个单元格中都有随机数量的此类短语，它们被放置在字符串的随机部分中。 我要求将每个短语提取到一个单独的单元格中。

请看下面的长字符串示例

另外，我以前是用excel做的，不幸的是，由于大量的数据，它一直在崩溃。

excel中的最终结果如下所示

谁能告诉我如何在 Power Bi 中实现这一目标

Answer 1

您可以使用分隔符拆分列（使用“DI”），然后提取每个结果列的前 4 位，然后根据需要添加前缀。

类似这样的：

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}}),
    #"Split Column by Delimiter" = Table.SplitColumn(#"Changed Type", "Column1", Splitter.SplitTextByDelimiter("DI", QuoteStyle.Csv), {"Column1.1", "Column1.2", "Column1.3", "Column1.4"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Split Column by Delimiter",{{"Column1.1", type text}, {"Column1.2", type text}, {"Column1.3", type text}}),
    #"Extracted First Characters" = Table.TransformColumns(#"Changed Type1", {{"Column1.2", each Text.Start(_, 4), type text}, {"Column1.3", each Text.Start(_, 4), type text}}),
    #"Removed Columns" = Table.RemoveColumns(#"Extracted First Characters",{"Column1.1"}),
    #"Added Prefix" = Table.TransformColumns(#"Removed Columns", {{"Column1.2", each "DI" & _, type text}}),
    #"Added Prefix1" = Table.TransformColumns(#"Added Prefix", {{"Column1.3", each "DI" & _, type text}}),
    #"Added Prefix2" = Table.TransformColumns(#"Added Prefix1", {{"Column1.4", each "DI" & _, type text}})
in
    #"Added Prefix2"

Answer 2

试试这个

let
  Source = Table.FromRows(
    Json.Document(
      Binary.Decompress(
        Binary.FromText(
          "i45WKsnILFYAokSF4pKizLx0BRdPQyNjE1MgDaLMgLSZuYWlAUxcKVYnWgmhxsTY1MxcAWYIjJ+XX64UGwsA",
          BinaryEncoding.Base64
        ),
        Compression.Deflate
      )
    ),
    let
      _t = ((type nullable text) meta [Serialized.Text = true])
    in
      type table [Column1 = _t]
  ),
  #"Changed Type" = Table.TransformColumnTypes(Source, {{"Column1", type text}}),
  fx =
    let
      fx = (input) =>
        Web.Page(
          "<script>
            var x='"
                    
            & input
            & "';
            var b = x.match(/DI[0-9]{5}/gm);
            document.write(b);
        </script>"


                  
        ){0}[Data]{0}[Children]{1}[Children]
    in
      fx,
  #"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each fx([Column1])),
  #"Expanded Custom" = Table.ExpandTableColumn(#"Added Custom", "Custom", {"Text"}, {"Text"}),
  #"Added Custom1" = Table.AddColumn(#"Expanded Custom", "Custom", each Text.Split([Text], ",")),
  #"Removed Columns" = Table.RemoveColumns(#"Added Custom1", {"Text"}),
  #"Expanded Custom1" = Table.ExpandListColumn(#"Removed Columns", "Custom"),
  #"Added Index" = Table.AddIndexColumn(#"Expanded Custom1", "Index", 1, 1, Int64.Type),
  #"Grouped Rows" = Table.Group(
    #"Added Index",
    {"Column1"},
    {{"ad", each _, type table [Column1 = nullable text, Custom = text, Index = number]}}
  ),
  #"Added Custom2" = Table.AddColumn(
    #"Grouped Rows",
    "Custom",
    each
      let
        x = [ad],
        #"Sorted Rows" = Table.Sort(x, {{"Index", Order.Ascending}}),
        #"Added Index1" = Table.AddIndexColumn(#"Sorted Rows", "Index.1", 1, 1, Int64.Type),
        #"Removed Columns1" = Table.RemoveColumns(#"Added Index1", {"Index"}),
        #"Added Prefix" = Table.TransformColumns(
          #"Removed Columns1",
          {{"Index.1", each "Value" & Text.From(_, "en-US"), type text}}
        ),
        #"Pivoted Column" = Table.Pivot(
          #"Added Prefix",
          List.Distinct(#"Added Prefix"[Index.1]),
          "Index.1",
          "Custom"
        )
      in
        #"Pivoted Column"
  ),
  #"Removed Other Columns" = Table.SelectColumns(#"Added Custom2", {"Custom"}),
  #"Expanded Custom2" = Table.ExpandTableColumn(
    #"Removed Other Columns",
    "Custom",
    {"Column1", "Value1", "Value2", "Value3", "Value4"},
    {"Column1", "Value1", "Value2", "Value3", "Value4"}
  )
in
  #"Expanded Custom2"

Answer 3

对我有用的最终更正代码：

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Merged", type text}}),
    #"Split Column by Delimiter" = Table.SplitColumn(#"Changed Type", "Merged", Splitter.SplitTextByDelimiter("DI", QuoteStyle.Csv), {"Column1.1", "Column1.2", "Column1.3", "Column1.4", "Column1.5","Column1.6","Column1.7","Column1.8","Column1.9","Column1.10"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Split Column by Delimiter",{{"Column1.1", type text}, {"Column1.2", type text}, {"Column1.3", type text}, {"Column1.4", type text}, {"Column1.5", type text}, {"Column1.6", type text}, {"Column1.7", type text}, {"Column1.8", type text}, {"Column1.9", type text}, {"Column1.10", type text}}),
    #"Extracted First Characters" = Table.TransformColumns(#"Changed Type1", {{"Column1.2", each Text.Start(_, 4), type text}, {"Column1.3", each Text.Start(_, 4), type text}, {"Column1.4", each Text.Start(_, 4), type text}, {"Column1.5", each Text.Start(_, 4), type text}, {"Column1.6", each Text.Start(_, 4), type text}, {"Column1.7", each Text.Start(_, 4), type text}, {"Column1.8", each Text.Start(_, 4), type text}, {"Column1.9", each Text.Start(_, 4), type text}, {"Column1.10", each Text.Start(_, 4), type text}}),
    #"Removed Columns" = Table.RemoveColumns(#"Extracted First Characters",{"Column1.1"}),
    #"Added Prefix" = Table.TransformColumns(#"Removed Columns", {{"Column1.2", each "DI" & _, type text}}),
    #"Added Prefix1" = Table.TransformColumns(#"Added Prefix", {{"Column1.3", each "DI" & _, type text}}),
    #"Added Prefix2" = Table.TransformColumns(#"Added Prefix1", {{"Column1.4", each "DI" & _, type text}}),
    #"Added Prefix3" = Table.TransformColumns(#"Added Prefix2", {{"Column1.5", each "DI" & _, type text}}),
    #"Added Prefix4" = Table.TransformColumns(#"Added Prefix3", {{"Column1.6", each "DI" & _, type text}}),
#"Added Prefix5" = Table.TransformColumns(#"Added Prefix4", {{"Column1.7", each "DI" & _, type text}}),
#"Added Prefix6" = Table.TransformColumns(#"Added Prefix5", {{"Column1.8", each "DI" & _, type text}}),
#"Added Prefix7" = Table.TransformColumns(#"Added Prefix6", {{"Column1.9", each "DI" & _, type text}}),
#"Added Prefix8" = Table.TransformColumns(#"Added Prefix7", {{"Column1.10", each "DI" & _, type text}})
in
    #"Added Prefix8"