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clim2f88j's avatar
clim2f88j
Frequent Visitor
2 years ago

Index Column Based on ID and Date

Hello everyone,   I need to add an index column based on consumers ID and date.   Data: ID Date AAA 1/1/23 AAA 3/7/23 AAA 4/18/23 BBB 12/19/22 BBB 4/5/23 CCC 7/9/23 ...
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clim2f88j's avatar
clim2f88j
Frequent Visitor
2 years ago

Thank you for helping me out but i get the following error with that DAX: EARLIER/EARLIEST refers to an earlier row context which doesn't exist.

 

In your example, the AAA ID with the 3/7/2023 date have the same index. I need them to be different.

Anonymous's avatar
Anonymous
Not applicable
2 years ago

Hi Sammyben ,

Please try sort by [ID] and [Date] first in ascending order in PowerQuery first:


Then group them by [ID] and add an Index column.

Expand columns and the output:

Advanced editor:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcnR0VNJRMtQ31DcyMDJWitWBCRnrmxMhZKJvaIEQc3JyAhlmpG9oCRI0QhI00TdFV4cQigUA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ID = _t, Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ID", type text}, {"Date", type date}}),
    #"Sorted Rows" = Table.Sort(#"Changed Type",{{"ID", Order.Ascending}, {"Date", Order.Ascending}}),
    #"Grouped Rows" = Table.Group(#"Sorted Rows", {"ID"}, {{"Data", each Table.AddIndexColumn(_, "Index", 1, 1, Int64.Type)}}),
    #"Expanded Data" = Table.ExpandTableColumn(#"Grouped Rows", "Data", {"Date", "Index"}, {"Date", "Index"})
in
    #"Expanded Data"

Best Regards,
Gao
Community Support Team

 

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