That's a process called de-normalisation, covered here: http://en.wikipedia.org/wiki/Denormalisation http://en.wikipedia.org/wiki/Denormalisation You should onl

That's a process called de-normalisation, covered here: http://en.wikipedia.org/wiki/Denormalisation http://en.wikipedia.org/wiki/Denormalisation You should only consider doing that after thorough profiling showing your joins are causing the performance loss.