(  )  ,   .         , ..       ,     ,   .            ,  CRUD- (CRUD     Create, Read, Update, Delete (, , , )).     .    ,    ,  ,   .
         , ,   ,   "-" (ER-)     .       (),   . 2.2,  ,      "-".
''fZ?""--*--<*-.: <:':.
Course
Course Code: Code Name: String Tutor: Persons_Name Room: Integer Timetable: Week_Map
Calculate_Fee() Book (Student) Cancel (Student) CancelQ
..*

PartTime
1..' Student
SS No: SS_No Name: Persons_Name Disabled: Boolean Date of Birth: Date
Book (Course) Cancel (Course)
Hours: Week_Map	|
Hour per Week: Number	f
	I
Alter_Hours()	I
Make_Full_Time()	I
FullTime
In Accomodation: Boolean \
Make_Part_Time()
. 2.2.    ()
24
Oracle 8