compare in the same graph values of two different period

[andrea1]

Hi all.

My purpose is compare, in the same graph, values of two different period:

TAB A:

20/03/2021 08:00:03    56

20/03/2021 08:00:05      67

20/03/2021 08:00:07      52

TAB B:

16/04/2013 15:03:04     61

16/04/2013 15:04:05      64

16/04/2013 15:04:06      51

16/04/2013 15:05:07      59

16/04/2013 15:05:08      57

If I select the time interval A 20/03/2021 08:00:03 - 20/03/2021 08:00:07 and the time interval B 16/04/2013 15:03:04 - 16/04 / 2013 15: 03: 08, I want in the same graph two lines with values TAB A and TAB B. The X axis starts from 0, which corresponds to both 03/20/2021 08:00:03 and 04/16 / 2013 15: 03:04 (the start of the two periods) and continues until the maximum end time between the two periods.
How can I do?

Thanks

Andrea

[andrea1]

Any news?