How to create program in delphi

Question

Thier is two table first call master and anothr call detals

Q for detal form design for input

if i create three field in table
first is title varchar (20) second field call datatype varchar (30) and third field call descriptions varchar (60)
during the input i would like to create popup for help from table and same data filed and its has to verify its similar data exhiting in data base let them select and change datatype as per located data user second datafield entry popup has to de active if first field data title is new then user second field popup should active