= Relational Design
== Релациска шема (со мапирачка трансформација)
* Bold и Italic-> Key attribute
* Bold и * -> Foreign key
* Bold -> required

----
* Users(**''user_id'',email,username,first_name,last_name,password,created_on**,modified_on)
* Clients(**''user_id''***)
* Business_Users(**''user_id''***)
* Administrators(**''user_id''***)
* Delivery_Man(**''user_id''*,business_user_id*,company_id* ,salary,date_of_employment**)
* Companies(**''company_id'',company_name,company_email,created_on,created_by,user_id***,modified_on,modified_by,**administrator_id***)
* Vehicles(**''vehicle_id'',chassis_number,vehicle_type,fuel_efficiency,company_id*,model_id* ,registration_id*,brand,price**)
* Models(**''model_id'',model_name,year,color,number_of_seats,number_of_doors,fuel,transmission,vehicle_type**)
* Registrations(**''registration_id'',plate_num,registred_on,valid_thru,is_available**)
* Payment_Cards(**''card_id'',card_number,cvc,valid_thru,holder_name,user_id***)
* Locations(**''location_id,company_id*'',city,street,street_number**)
* Payments(**''payment_id,card_id*'', payment_date,time**)
* Contracts(**''signed_date,user_id*,vehicle_id*,deliveryman_id*,payment_id*,card_id*'',address,from_date,to_date**)
* Is_responsible_for(**''user_id*,vehicle_id*''**)

=== ''DDL скрипта за бришење на табелите и креирање на табелите''