Forum Discussion
How to expand all nested tables at once table.expandtablecolumn
Hi guys,
I've an issue, when working with getting data from web (html) it is common to have a source with hundred or more nested tables. How can i expand it all at once?
I've seen a code from Chris for PowerQuery, but i was unable to use it in Power BI.
Glad you can assist.
Best
Carlos
The code below expands all nested tables from this webpage (as an example) as requested, but I'm note sure if the result makes much sense.
It includes an embedded recursive function fnCombineAll.Possibly some further refinement would be required, but at least we have a start.
let Source = Web.Page(Web.Contents("https://community.powerbi.com/t5/Desktop/How-to-expand-all-nested-tables-at-once-table-expandtablecolumn/m-p/129451#U129451")), Data0 = Source{0}[Data], ChildrenWithTable = Table.SelectRows(Data0, each [Children] is table), fnCombineAll = (TableSoFar as table, newChildren as table) as table => let Combined = Table.Buffer(Table.Combine(List.Union({{TableSoFar},newChildren[Children]}))), ChildrensChildrenWithTable = Table.AddColumn(newChildren, "ChildrensChildren", each Table.SelectRows([Children], each [Children] is table)), ChildrensChildrenCombined = Table.Combine(ChildrensChildrenWithTable[ChildrensChildren]), CombinedAll = if Table.RowCount(ChildrensChildrenCombined) = 0 then Combined else @fnCombineAll(Combined, ChildrensChildrenCombined) in CombinedAll, CombinedAll = if Table.RowCount(ChildrenWithTable) = 0 then Data0 else fnCombineAll(Data0, ChildrenWithTable), #"Added Index" = Table.AddIndexColumn(CombinedAll, "Index", 1, 1), #"Reordered Columns" = Table.ReorderColumns(#"Added Index",{"Index", "Kind", "Name", "Children", "Text"}) in #"Reordered Columns"
6 Replies
- MarcelBeug
Community Champion
The code below expands all nested tables from this webpage (as an example) as requested, but I'm note sure if the result makes much sense.
It includes an embedded recursive function fnCombineAll.Possibly some further refinement would be required, but at least we have a start.
let Source = Web.Page(Web.Contents("https://community.powerbi.com/t5/Desktop/How-to-expand-all-nested-tables-at-once-table-expandtablecolumn/m-p/129451#U129451")), Data0 = Source{0}[Data], ChildrenWithTable = Table.SelectRows(Data0, each [Children] is table), fnCombineAll = (TableSoFar as table, newChildren as table) as table => let Combined = Table.Buffer(Table.Combine(List.Union({{TableSoFar},newChildren[Children]}))), ChildrensChildrenWithTable = Table.AddColumn(newChildren, "ChildrensChildren", each Table.SelectRows([Children], each [Children] is table)), ChildrensChildrenCombined = Table.Combine(ChildrensChildrenWithTable[ChildrensChildren]), CombinedAll = if Table.RowCount(ChildrensChildrenCombined) = 0 then Combined else @fnCombineAll(Combined, ChildrensChildrenCombined) in CombinedAll, CombinedAll = if Table.RowCount(ChildrenWithTable) = 0 then Data0 else fnCombineAll(Data0, ChildrenWithTable), #"Added Index" = Table.AddIndexColumn(CombinedAll, "Index", 1, 1), #"Reordered Columns" = Table.ReorderColumns(#"Added Index",{"Index", "Kind", "Name", "Children", "Text"}) in #"Reordered Columns"- cpinho
Advocate I
Hi Marcel,
Thank you very much for you great assistance. Trying to put it working together. But sometimes is just a mess.
- AnonymousNot applicable
Hello,
I need to do a similar thing as I also have rows with nested tables. Is there a way to do this via the UI?
Thank you
J
- DebbieE
Community Champion
Im new to Power BI and Im not sure how you would use the above code.
Do you have the steps on how to actually implement this?
Thanks