"The general who wins a battle makes many calculations in his temple before the battle is fought. The general who loses a battle makes but few calculations beforehand. Thus do many calculations lead to victory, and few calculations to defeat: how much more no calculation at all! It is by attention to this point that I can foresee who is likely to win or lose." | ||
| --Sun Tzu, The Art of War | ||
There is a great skill in creating the right expression to calculate the right answer. Being able to do this in all circumstances relies on having a good knowledge of creating advanced expressions. This is what this chapter aims to teach you. Of course, the best path to mastery in this subject is actually getting out and doing it, but there is a great argument here for regularly practicing with dummy or test datasets.
When presented with a problem that needs to be solved, all the QlikView masters will not necessarily know immediately how to answer it. What they will have though...