How to relate two sql table : Hi I have two tables cars and owners . ownerno is the primary key in table owners.  I would like to know how I can put ownerno as foreign key in cars table and still insert values that are different from my first table

cars
REGNO   MAKE COLOUR PRICE OWNERNO 
KAA462J FORD RED     120000 824 
KAB230Q SKODA BLUE    110000 828 
KAV201W MERCEDES BLUE 220000 832 
KAA306T TOYOTA BLUE   130000 836 
Owners 
OWNERNO OWNERNAME OWNERADDRESS 
724 Atieno Otieno 567 Umoja 
828 Hassan Hussein 987 Kayole 
932 Wanjiru Wanjiri 735 Kariobangi