how do i get data from a structure using join?

hi,

what is the actual use of a structure.?

my problem is :

KUAGV is an existing STRUCTURE. it has got one fields each which links to MARA, AND VBKD tables. i want to fetch all related information from KUAGV, mara, vbkd . which is the better way : using joins or views or anything else? how do i

get data from a structure using join?