Merge two tables using DAX

hi guys,

need some help with the problem above.

I have two tables, table A and table B - A is old data from our old system and B is new data from our new system. They both have the same format and columns.

I want to combine these tables so that the all the data is in one single table but it should not add on to extra columns it needs to be add onto each other.

However, table A and B are DAX tables using CROSSJOIN with the calendar table so dates are split out.

This means i cant use query editor as it is not a query.

I have tried:

• Using UNION and INTERSECT - i get an error saying "column with the name 'Column' already exists" ('Column' changes everytime i try change the formula).
• Combining using Query Editor first then doing the CROSSJOIN - same error as above.

What should i do?