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toum's avatar
toum
Helper II
3 years ago

Get distinct rows

Hello All,

Please I need your help on this, I have a table that contains a column named Ref and another column named status I need to get all the rows when status='On', then I should take all records when status=OFF and Ref are not taken from the beginning while taking the "On" status.

 

Thank you all in advance.

Need Help

1 Reply

  • BA_Pete's avatar
    BA_Pete
    Super User
    3 years ago

    Hi toum ,

     

    Try this:

    let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjNT0lHyd3MDko5KsTrRSuYIASewgKERXMAZImAKF3BBUuEHJFyRFID4bmC+EZzvDuGbw/geCPlwR88QTz93IMtbKTYWAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Ref = _t, Status = _t, Link = _t]),
    groupRef = Table.Group(Source, {"Ref"}, {{"Count", each Table.RowCount(_), Int64.Type}, {"data", each _, type table [Ref=nullable text, Status=nullable text, Link=nullable text]}}),
    expandData = Table.ExpandTableColumn(groupRef, "data", {"Status", "Link"}, {"Status", "Link"}),
    filterCriteria = Table.SelectRows(expandData, each ([Status] = "OFF" and [Count] = 1) or ([Status] = "ON"))
in
    filterCriteria

     

    Summary:

    1) groupRef = group on the [Ref] column and create one Count aggregate and one All Rows aggregate column.

    2) expandData = expand the nested [data] column back out to reinstate original columns.

    3) filterCriteria = filter table using [Count] column as part of the criteria.

     

    Example output:

     

    Pete