Custom Field creaded in WebUI not mapped with data base table field

Dear Experts,

We we create a new custom fied in CRM WebUI through AET technique a field will get created in data base table automatically , after then do we have to do mapping also between the field that got created in WebUI and field created in table ??

If yes please provide the steps or do we have to activate any method after custom field got generated am asking because my fied is ready in webui and DB but values are not reflecting from DB table