Hello!
I´ve got a table populated with 4 columns as follow:

I want to choose column 2 (NUMERO DE PETICIONES) to be the height of the Bar and column 4 (DESCRIPCION) to be the name of the bar.
How can I archieve this???
Try changing the query column order to,
SELECT
DESCRIPCION,
NUMERO DE PETICIONES,
etc.,
xAxes.0.render : category
?