How to retrieve data from DB table and Display it

I have a general question but i don't know if this is the right place.

I want to display in a K2 item a specific info (field) from a query result. For example: I have a table with "Firstname", "Lastname", "City", "Zip", etc.

FIRSTNAME: { fld_firstname}
LASTNAME: { fld_lastname}
CITY: { fld_city}
ZIP: { fld_zip}

How to retrieve data from my DB (SQL Query) and display it in a specific K2 item line by line but not on a table?
If there is a module to doing that or a simple code please help me on this.

Thank you

Hi

I'm not sure if I understand but it sounds like a job for K2 extra fields Please check this option and let me know if this can work.