I need some help in my database design. The following chart showing the current stracture of a small part of my database. What my problem is now ? ? ? The table SYSTEMATIC_RASH_EPISODES must have from one to three sub records depents on what drugs(medicens) the doctor must give to patient for each column starting from the SYRE_SKIN_PALM_ITCH. All the columns after SYRE_SKIN_PALM_ITCH are storing only boolean values. The question is : How can i do that ? ? ? Thanks a lot . . .