A database sys.:- is basically just a computerized record-keeping sys. the database itself can be regarded as a kind of electronic filing cabinet; that is, it is a repository or container for a collection of computerized data files. Users can perform a variety of operations involving
- Adding new files to the db.
- Inserting data into existing files.
- Retrieving data from existing files.
- Deleting data from existing files.
- Removing existing files from the db.
A DB is a collection of related and organized info., the db is a structure object consist of data and meta data. The data in a db is the actual stored descriptive info., such as a name, address of student. Meta data describes the structure applied by a db to the student data. In other words, the meta data is the student table definition. The student table definition contain the fields for name and address, the length of each field and data type. Meta data applies structure and organization of raw data with meta data to being the structure part of the db contains both meta data and raw data.
Any db sys involve four major components: data, H.w, S.W, and users.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .