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Working out Days since based on a flag
The logic for this one has me stumped and I am hoping the super brain collective may be able to help me. I have been using Power BI on and off for quite a while, but still have a long way to go and ...
Hi Wayne74, I'm not sure if this is what are you looking for:
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After
let Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMkxU0lEyNtA3MNY3MjAyAXJCgkJdlWJ1oFJGlrilcOsytECScnP0CUaWM8cjh9tIU6y6jJKgukwxdIGlLHDKGCPJoJuHoSkWAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [RegNo = _t, Date = _t, #"Issue 1" = _t]), ChangedType = Table.TransformColumnTypes(Source,{{"Date", type date}, {"Issue 1", type logical}}), GroupedRows = Table.Group(ChangedType, {"RegNo"}, {{"Days since last FALSE ISSUE", each [ a = List.Max(Table.SelectRows(_, (x)=> x[#"Issue 1"] = false)[Date]), //Max FALSE Date b = Duration.TotalDays(Date.From(DateTime.FixedLocalNow()) - a) ][b], Int64.Type}}) in GroupedRows
