,      "-"     ():
        ,    ,     . , ,    Student    (Book)     (      Course).  :    Course    .        Student   .
          ,    "-". ,    ,        , ,     ,   .   ,      .
         . Tutor,     Course,    .     . Week Map,      ,    . Week Map    ,   -,    .    ,       Week Map ,   -   .
    PartTime  FullTime     Student.         ,  ,     .           .  , OracleS    .
   ,      ,     .             .     (, Tutor   )     .  "  "          .            (intersection entity),   Course Booking.      VARRAY     Course    Students   VARRAY    Students   Courses.         ,         .
       . ,   ,      .     ,       .      - , , ,   , ,         OracleS!
2.    OracleS	25