I have seen something similar in a previous question. My inforrnation though is on two different tables The information on the bar chart is on two separate tables than I cannot load into Qlikview as one to be able to use the dimension field idea
In the chart of the above example document (nice work btw nagarjuna.kothamandi), disable Show Legend and Label for Dim_2 (in tab Dimensions).
If you don't want to create an extra field in your script just to show two bars side-by-side, you can use the ValueList() function in a calculated dimension instead of Dim_2. ValueList() will create a synthetic dimension on the spot.
For example, replace Dim_2 with this expression:
And in your expressions, replace the test for a particular Dim_2 value with: