您可以将数据加载到powerquery中，然后从左侧转换为右侧的数据表

代码是

let  Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Added Custom1" = Table.AddColumn(Source, "Date", each List.Generate(()=>[x=[Start Date],i=0], each [i]<12, each [i=[i]+1,x=Date.AddMonths([x],1)], each [x])),
#"Expanded Custom" = Table.ExpandListColumn(#"Added Custom1", "Date"),
#"Added Custom" = Table.AddColumn(#"Expanded Custom", "Year", each Date.Year([Date])),
#"Added Custom2" = Table.AddColumn(#"Added Custom", "Month", each Date.Month([Date])),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom2",{"Start Date", "End Date", "Date"})
in  #"Removed Columns"

然后，将powerquery作为透视报表加载回excel并生成表
第一节第一节第一节第二节第一节
或者，只需使用use

let  Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Added Custom1" = Table.AddColumn(Source, "Date", each List.Generate(()=>[x=[Start Date],i=0], each [i]<12, each [i=[i]+1,x=Date.AddMonths([x],1)], each [x])),
#"Expanded Custom" = Table.ExpandListColumn(#"Added Custom1", "Date"),
#"Removed Columns" = Table.RemoveColumns(#"Expanded Custom",{"Start Date", "End Date"}),
#"Grouped Rows" = Table.Group(#"Removed Columns", {"Date"}, {{"Amount", each List.Sum([Amount]), type number}, {"Case Count", each List.Sum([Case Count]), type number}}),
#"Changed Type" = Table.TransformColumnTypes(#"Grouped Rows",{{"Date", type date}, {"Amount", type number}, {"Case Count", type number}})
in   #"Changed Type"

生成此表，然后绘制图表