Opening & closing balances in powerBI - powerbi

Question

I have a table for GL transactions for a whole period over the years. Now I need to develop a table in which I can see the opening balance and closing balance for each month.
Ex :
enter image description here
result I need is,
enter image description here
I tried "closingbalancemonth" function, but it gives the total of transactions done on the last day of the month as the closing balance.

Answer 1

this is not exactly what you want but at least it gives correct results.
Closing Balance
Closing Balance =
CALCULATE(sum(Transactions[GL Transactions]),
filter(all(Transactions),
EOMONTH(min(Transactions[date]),0)>Transactions[date]))
Opening Balance
Opening Balance =
CALCULATE(sum(Transactions[GL Transactions]),
filter(all(Transactions),
EOMONTH(min(Transactions[date]),-1)>Transactions[date]))
there are also two more calculated columns. one is for the report and one is for sorting..
for the report :
Year & Month = FORMAT(Transactions[date],"MMM - YY")
for sorting :
YearMonth = year(Transactions[date])&MONTH(Transactions[date])
see also the attached sample file

Answer 2

You can also try this which has been solved on the Power Query side...
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("bY3BCcAwDAN38TsRioObdJbg/dcoFAwq9GfuJPkcG7RmAww4/b1p2YqHiB4iNniVcG3cIvpna4Hr78kU7pJ3cBeflvkA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"GL account" = _t, date = _t, #"GL Transactions" = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"date", type date}, {"GL Transactions", type number}}),
#"Sorted Rows" = Table.Sort(#"Changed Type",{{"date", Order.Ascending}}),
#"Added Custom1" = Table.AddColumn(#"Sorted Rows", "Eomonth", each Date.EndOfMonth([date])),
#"Grouped Rows" = Table.Group(#"Added Custom1", {"GL account", "Eomonth"}, {{"Sum GL Transactions", each List.Sum([GL Transactions]), type nullable number}}),
#"Added Custom" = Table.AddColumn(#"Grouped Rows", "Closing Balance", each Function.Invoke((current as date,tb as table)=>
List.Sum(Table.SelectRows(tb,each [Eomonth]>= List.Min(#"Grouped Rows"[Eomonth]) and [Eomonth]<=current)[Sum GL Transactions])
,{[Eomonth],#"Grouped Rows"})),
#"Added Custom2" = Table.AddColumn(#"Added Custom", "Opening Balance", each Function.Invoke((current as date,tb as table)=>
List.Sum(Table.SelectRows(tb,each [Eomonth]<current)[Sum GL Transactions])
,{[Eomonth],#"Grouped Rows"})),
#"Changed Type1" = Table.TransformColumnTypes(#"Added Custom2",{{"Closing Balance", type number}, {"Opening Balance", type number}, {"Eomonth", type date}}),
#"Removed Columns" = Table.RemoveColumns(#"Changed Type1",{"Sum GL Transactions"}),
#"Unpivoted Columns" = Table.UnpivotOtherColumns(#"Removed Columns", {"GL account", "Eomonth"}, "Attribute", "Value")
in
#"Unpivoted Columns"
--->
New Version