Re: primary vs foreign key and change in size of tool
because I am trying to figure out why my tool size went up after making the change. because all the tables stayed the same. the loading sequence of A B C stayed the same.
the only difference is key_a and key_c are both in Table A. think key_a being market, and key_c being region. Table A had key a before, getting key c will not impact rows in A because key a and key c are many to one. it's strange my tool size go up even though all data stayed the same