Use Query Variable to calculate field

[jefferson0904]

Is there a way to use variables to reference a query to calculate a field.
Here it is what I want to do:

I Have a query returning the total number of problems. Query A
I Have a second query returning the total number of solved problems. Query B

I want to show the percentage of problems solved, using Query B e Query A to calculate it.

Is there a way to do that?

[ddurieux]

not possible, the only possibility is to use mysql datasource (so not this plugin) and make with in the SQL query.
I had something like this to do and I do it this MySQL datasource. Code it in this plugin will be very complex, so a solution exist with MySQL datasource.

Perhaps it can do it inside, but only possible with a quotation, not possible on my little free time