Powerbi 如何计算power bi中行的百分比

我有一个PostgreSQL数据库，其中每一行表示一天，每一列表示在特定日期测量的客户的属性。该数据库每天都在使用python代码进行更新。在这些日子里，我试图在Power Bi中构建一个仪表板，以便与利益相关者共享数据。我想在仪表板上添加一个折线图，显示一列值随时间的变化。在这个折线图中，我想显示每天百分比的变化。在excel中，它应该如下所示：

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您可以在电源查询中（即在数据导入和转换期间）完成此操作，如下所示：

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("TczJCcAwDETRXnQ2aIsSqRbj/tuwCQqZ62P+zEkWnGyiRYNUhNY4doNF2wOWbQlWbfWbdesC1q0rWMVryvWRe98BXWe1Ng==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Date = _t, #"Column 1" = _t]),  // set up the table as shown in your example
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type date}, {"Column 1", Int64.Type}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1),
    #"Added Index1" = Table.AddIndexColumn(#"Added Index", "Index.1", 1, 1),
    #"Merged Queries" = Table.NestedJoin(#"Added Index1", {"Index"}, #"Added Index1", {"Index.1"}, "Added Index1", JoinKind.LeftOuter),
    #"Expanded Added Index1" = Table.ExpandTableColumn(#"Merged Queries", "Added Index1", {"Column 1"}, {"Added Index1.Column 1"}),
    #"Inserted Subtraction" = Table.AddColumn(#"Expanded Added Index1", "Subtraction", each [Column 1] - [Added Index1.Column 1], Int64.Type),
    #"Removed Columns" = Table.RemoveColumns(#"Inserted Subtraction",{"Index", "Index.1", "Added Index1.Column 1"})
in
    #"Removed Columns"

加载数据，确保行按日期升序排列：

添加一个索引列“来自0”，然后添加另一个索引列“来自1”：

将表与其自身合并，首先选择“索引”，然后选择“Index.1”：

从添加到表中的新列展开“第1列”：

从原始值中减去新列（选择“第1列”和“添加索引1.第1列”，然后转到添加列>标准>减去）：

删除所有不需要的列：

当然，您可以根据需要重命名列

本例中的电源查询代码如下：

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("TczJCcAwDETRXnQ2aIsSqRbj/tuwCQqZ62P+zEkWnGyiRYNUhNY4doNF2wOWbQlWbfWbdesC1q0rWMVryvWRe98BXWe1Ng==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Date = _t, #"Column 1" = _t]),  // set up the table as shown in your example
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type date}, {"Column 1", Int64.Type}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1),
    #"Added Index1" = Table.AddIndexColumn(#"Added Index", "Index.1", 1, 1),
    #"Merged Queries" = Table.NestedJoin(#"Added Index1", {"Index"}, #"Added Index1", {"Index.1"}, "Added Index1", JoinKind.LeftOuter),
    #"Expanded Added Index1" = Table.ExpandTableColumn(#"Merged Queries", "Added Index1", {"Column 1"}, {"Added Index1.Column 1"}),
    #"Inserted Subtraction" = Table.AddColumn(#"Expanded Added Index1", "Subtraction", each [Column 1] - [Added Index1.Column 1], Int64.Type),
    #"Removed Columns" = Table.RemoveColumns(#"Inserted Subtraction",{"Index", "Index.1", "Added Index1.Column 1"})
in
    #"Removed Columns"

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您还可以使用“逐日变化”并将值绘制为百分比