slicer

i had an issue with my dashboard slicer. i have 6-table in my database which are linked through "date".

Each table has 3-same heading (carrier, flight number & description) with different values. 

Now i want to create a slicer of above three headings which should connect with my dataset and each other as well. i have tried union(seleccolumns) but it work only oneway (i meant here, above 3-headings are not in realtionship at all).