How to use Power Query to keep appending table2 to table1 without VBA

[mrchonginhk]

I am not allowed to use VBA on my project so I am trying to use PowerQuery
I have 2 tables in their respective worksheet in the same workbook.
TableA is the master data table.
TableB is new records table which is adding records per day but any record of prior day will be wiped out before new records are added.

I need to repeatedly add Table B into Table A.
I am using Excel Power Query to Append these two Tables but what it does is only stick 2 tables together based on the data now.
What I want is, for example, in day 1, Table B has record ABC.
Then I want on run query the 1st day, Table A = Original Table A + ABC
The next day when Table B is updated as XYZ,
I want on 2nd run, the Table A become
Original Table A + ABC + XYZ

Right now the Merge query is only giving me Original Table A + XYZ (ie latest Table A + Table B only) on 2nd run.
I am exploring Table.InsertRows but dunno how to make use of it in my case... pls help.

 

[mrchonginhk]

I am using this but if fails

let
Source = Table.InsertRows(Table1,0,Table.ToList(Table2))

in
Source