i am building up an inventory system as a project.

the system has a master database whereby the user can either add in new
items or delete existing items using a user-interface. the user should be
able to search for the an item under either the category that it belongs to
or by keywords on the interface too.

currently, i am stuck at the parts on deleting existing items from database
on the user-interface and searching by keywords for the items. Could anyone
pls give some advise on how to do them?