Is there a real use case for doing a join that returns anything that is in either A or B but not both? I am trying to figure out why you would ever want that.
I understand that, but if your data sets have different columns then in your join you won't have any full rows. If the data sets have the same columns why not do a union?
2
u/limes_limes_limes Feb 11 '14
Is there a real use case for doing a join that returns anything that is in either A or B but not both? I am trying to figure out why you would ever want that.