Add a column from another table

Hello,

I've two tables: 'Positions' and 'Applicants'. I need to make a new visual table out of the two tables mentioned above. The difficulty here is that I want to combine position[estimatedate] and applicants[joiningdate] into a single column and add a filter to display next month information in the visual table.

I'm new to PowerBI and would appreciate any assistance.

Thanks in advance!