The first chart on this example shows all the data available in the database (access, .mdb) . We assume that we have 5 days and each day we have received information at equal (also might not be equal) intervals time. In our case - half an hour. Each time span starts at 9.00 and ends at 18.00.

The second chart displays the average value for each day. By clicking on the bar for some day, you can see a more detailed information about how the value has been changing during this day.