title: mysql - how many columns is too many?
body: <p>I'm setting up a table that might have upwards of 70 columns. I'm now thinking about splitting it up as some of the data in the columns won't be needed every time the table is accessed. Then again, if I do this I'm left with having to use joins. </p>
  
  <p>At what point, if any, is it considered too many columns? </p>