I have a BQ-query which has run fine for some months now. Since a few days some columns seem to have doubled. I mean that 3 of my 10 columns are double in excel, and now I have 13 columns, instead of 10.
I found it. I’m querying 2 fact tables, with one of the dimensions only being selected with the second fact. Apparantly BQ splits the columns in 2 parts then: one for my first fact, and one for the second. If I delete the one dimension in my query everything turns to normal.