وفّر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
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عملية إنشاء مخطط بسيط أو تمثيل مرئي لكامل نظام المعلومات أو أجزاء منه باستخدام النصوص والرموز لتمثيل الاتصالات بين البنى ونقاط البيانات وكيفية تدفقها. تهدف نمذجة البيانات إلى توضيح أنواع البيانات المُستخدمة والمخزنة ضمن النظام، بالإضافة إلى العلاقات بين تلك الأنواع والطرق الممكنة لتجميع وتنظيمها. ويُستخدم المخطط الناتج عادةً لضمان كفاءة استخدام البيانات قبل بناء نظام جديد أو لإعادة هندسة نظام موجود بالفعل.
هناك ثلاث أنواع رئيسية لنماذج البيانات هي:
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