Percentage between two columns

Hello gaikwadaa123 

you can join both tables by the datetime column and then expand your F-Column and then the needed calculation

Here an example

let
    A = 
    let
        Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjDUAyIjAyNDBQNDKwMDJR0lQ6VYHVQJI4iEkVJsLAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [DateTime = _t, #"DBDryBulb-A" = _t]),
        #"Changed Type" = Table.TransformColumnTypes(Source,{{"DateTime", type datetime}, {"DBDryBulb-A", Int64.Type}}, "de-DE")
    in
        #"Changed Type",
    B= 
    let
        Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjDUAyIjAyNDBQNDKwMDJR0lY6VYHVQJI4iEiVJsLAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [DateTime = _t, #"DBDryBulb-F" = _t]),
        #"Changed Type" = Table.TransformColumnTypes(Source,{{"DateTime", type datetime}, {"DBDryBulb-F", Int64.Type}}, "de-DE")
    in
        #"Changed Type",
    JoinTables= Table.NestedJoin
    (
        A,
        "DateTime",
        B, 
        "DateTime",
        "B",
        JoinKind.LeftOuter
    ),
    #"Expanded B" = Table.ExpandTableColumn(JoinTables, "B", {"DBDryBulb-F"}, {"DBDryBulb-F"}),
    #"Added Custom" = Table.AddColumn(#"Expanded B", "Custom", each ([#"DBDryBulb-A"]-[#"DBDryBulb-F"])/[#"DBDryBulb-A"])
in
    #"Added Custom"

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

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Have fun

Jimmy

Hi gaikwadaa123 ,

After merging two tables, please detect the data type for each column, if the data type is wrong, it could cause the wrong calculation result.

Best Regards,
Community Support Team _ Yingjie Li
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