CheckBox Group - selected items as TEXT

Hello everyone, Happy to join Retool community.
I try to figure it out for few minutes. I ve got relation data base with some query procedures. Because with my sql query CALL create database entry for each selected checkbox I need to get value of selected checkboxes as TEXT because with the current value I get Incorrect number of arguments for PROCEDURE error.

I found solution (was so easy :blush:), sometimes you need a break to think again.

{{ checkbox.value.join(',') }}