[rt-users] How to learn RT? (I need to add custom database query)

[Aleksey Tsalolikhin]

Thank you, Emmanuel for the RTFM pointer, my new tickets now include a
Custom Field with values fetched from an external source.  Woo-hoo!
:)

Next question - and this is what my boss really wants - is to have
multiple text boxes where the user provides input, and then they click
"search" and another custom field, of  type "select a value", or
"select multiple values" is populated from an external sources based
on the input provided in the first few text boxes.

For example, the user input might be:  company and city, and the
select menu would contain all the stores operated by $company in
$city.  And user needs to be able to change the value of $city, for
example, and click "refresh" or "submit", and the list of stores would
change.

Can RT do that, please?  How?

Best,
Aleksey