Mysql: add round and division

[eluser]Unknown[/eluser]
Hello,
for a project i need execute a query with round function and with a division.

I watch the CI documentation and i find "query" method but i can't use it with Grocery Crud.

I also add sum() to Grocery Crud because there is the sum function into CI.

Add division is most, important anyone has experience with this issue?

Thanks
Valerio

[eluser]Unknown[/eluser]
Ok,
I solve this issue by add a function who allow me to add custom sql to "ar_select" array.