by Mohamed El Desouki – محمد الدسوقى [email protected] Tel :00966 553450836 جامعة سلمان بن عبد العزيز – السعودية – الخرج How To Add Unique Constraint to Table. Unique كيف تستخدم قيد الــ Text Book: Fundamentals of Database Systems, 5th Edition, by Elmasri/Navathe, published by Addison-W oracle create table statement oracle drop table statement oracle constraints database constraints primary key constraint foreign key constraint check constraint null not null constraint unique constraint