Need help - by: chernitsov.ad

Hello.
I have a problem.
I want to do such a thing:
on the page /htdocs/societe/soc.php?action=create i create a new drop-down list with some values. How to make sure that these values would be added to the database in table xxx_societe (in this table, I created a new column zzz). Then I could display this value on page /htdocs/societe/soc.php?socid=qqq, htdocs/societe/soc.php?socid=qqq&action=edit and /htdocs/comm/fiche.php?socid=qqq.
I can't loaded this information from and to database.
Help please (and sorry for my englisg)