Proving the Input values in a table with a dropdown and save the values

Hi Experts,

I have a requirement to create a table which is empty (in BSP)and I want to enter the values in a table, for eg: Unit , RegNo, Regvalidity date, item categories. are the coulum names.But I have to display the values in the categories column in dropdown.

Finally I enter the values in a table and select the values in a categorie column and save the values in a ztable.

Please provide me solution how to proceed with this requirement?.

Thanks ,

Regards,

Kiran