This shows different ways how we could show range over Xaxis of chart while values are coming from database.
1 chart shows not grouped data
2. shows 2 groups formed by writting expression in Category of X Axis
3. shows group formed in query it self
4. Show how we colud use table to form range and use it in chart
(check expression for "Column Binding")
Note: Check this New uploaded file it is created inOPEN Source Birt 2.6.1.