【发布时间】：2021-04-18 11:50:05
【问题描述】：
我有来自多个供应商的数据，我想比较这些数据。下图中显示的数据之前已使用 power query 通过一系列步骤进行了转换。最后一步是旋转供应商列（在此示例中由 X、Y、Z 组成），以便可以比较这些新列并返回最大值。
如何比较 X、Y 和 Z 列中的值来执行此操作？重要的是，XY 和 Z 不一定是唯一的供应商。如果我将 Say A 添加为原始数据的新供应商，则会生成一个新列 A，我希望将其包含在比较中，以便在最后的列输出为每一行找到的最高值。因此，在本例中，自上而下读取将是：3,3,1,1,5,0.04,10 等。
谢谢
链接到文件https://onedrive.live.com/?authkey=%21AE_6NgN3hnS6MpA&id=8BA0D02D4869CBCA%21763&cid=8BA0D02D4869CBCA
M 代码：
let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Material", type text}, {"Residual Solvents", type text}, {"RMQ", type text}, {"COA", type text}, {"Technical Data Sheet", type text}}),
//Replace Time and null with blank
#"Replaced Value" = Table.ReplaceValue(#"Changed Type","00:00:00","",Replacer.ReplaceText,{"Material", "RMQ", "Residual Solvents", "Technical Data Sheet", "COA"}),
#"Replaced Value1" = Table.ReplaceValue(#"Replaced Value",null,"",Replacer.ReplaceValue,{"Material", "RMQ", "Residual Solvents", "Technical Data Sheet", "COA"}),
//Trims all whitespace from user
#"Power Trim" = Table.TransformColumns(#"Replaced Value1",{{"Material", #"PowerTrim", type text}, {"Residual Solvents", #"PowerTrim", type text}, {"RMQ", #"PowerTrim", type text}, {"COA", #"PowerTrim", type text}, {"Technical Data Sheet",#"PowerTrim", type text}}),
//Unpivot to develop a single column of solvent/metals/date data
#"Unpivoted Other Columns" = Table.UnpivotOtherColumns(#"Power Trim", {"Material", "Supplier"}, "Attribute", "Value"),
//split into rows by line feed
#"Split Column by Delimiter" = Table.ExpandListColumn(Table.TransformColumns(#"Unpivoted Other Columns",
{{"Value", Splitter.SplitTextByDelimiter("#(lf)", QuoteStyle.Csv), let itemType = (type nullable text) meta [Serialized.Text = true] in type {itemType}}}), "Value"),
#"Trimmed Text" = Table.TransformColumns(#"Split Column by Delimiter",{{"Value", Text.Trim, type text}}),
//filter out the blank rows
#"Filtered Rows" = Table.SelectRows(#"Trimmed Text", each ([Value] <> "" and [Value] <> "Not Provided")),
//Add custom column for separating the tables
#"Added Custom" = Table.AddColumn(#"Filtered Rows", "Custom", each try Date.FromText([Value]) otherwise
if [Value] = "Heavy Metals" or [Value] = "Residual Solvents" or [Value] = "Other" then [Value] else null),
#"Changed Type1" = Table.TransformColumnTypes(#"Added Custom",{{"Custom", type text}}),
#"Filled Down" = Table.FillDown(#"Changed Type1",{"Custom"}),
//Filter the value and custom columns to remove contaminant type from Value column and remove dates from Custom column
#"Filtered Rows1" = Table.SelectRows(#"Filled Down", each ([Custom] = "Heavy Metals" or [Custom] = "Residual Solvents") and ([Value] <> "Heavy Metals" and [Value] <> "Residual Solvents")),
//split substance from amount
#"Split Column by Delimiter1" = Table.SplitColumn(#"Filtered Rows1", "Value",
Splitter.SplitTextByEachDelimiter({" "}, QuoteStyle.Csv, true), {"Substance", "Amount"}),
//Filter for Solvents Table
#"Filtered Rows2" = Table.SelectRows(#"Split Column by Delimiter1", each ([Custom] = "Heavy Metals")),
#"Changed Type2" = Table.TransformColumnTypes(#"Filtered Rows2",{{"Amount", type number}}),
//Group by Material and Substance, then extract the Max contaminant and Source
#"Grouped Rows" = Table.Group(#"Changed Type2", {"Substance","Material", "Supplier"}, {
{"Amount", each List.Max([Amount]), type number},
{"Source", (t) => t[Attribute]{List.PositionOf(t[Amount],List.Max(t[Amount]))}, type text}
}),
#"Sorted Rows" = Table.Sort(#"Grouped Rows",{{"Substance", Order.Ascending}}),
//PIVOT to compare suppliers
#"Pivoted Column" = Table.Pivot(#"Sorted Rows", List.Distinct(#"Sorted Rows"[Supplier]), "Supplier", "Amount", List.Sum)
in
#"Pivoted Column"
【问题讨论】：
标签： excel comparison office365 powerquery customcolumn