Load the following script:

CrossTable(Year, Sales)
LOAD * INLINE [
    Month, 2011, 2012, 2013
    1, 123, 233, 376
    2, 423, 355, 333
    3, 212, 333, 234
    4, 344, 423
    5, 333, 407
    6, 544, 509
    7, 634, 587
    8, 322, 225
    9, 452, 523
    10, 478, 406
    11, 679, 765
    12, 521, 499
];

Follow these steps to create a bar chart with a secondary dimension:

QlikView will automatically add the secondary dimension to a bar chart when:

If there are two expressions, the bars will automatically stack. By setting an expression with a value of 0, the second bars will not appear. However, we do need to remove the legend.

This can be useful in a number of situations. However, as previously noted, the two dimensions must be in a strict hierarchy. If there are values that don't exist under all the primary dimensions, they will be represented under all of them anyway and that may not achieve the results that you were hoping for.