كتاب مهارات تكنولوجيا المعلومات الثاني عشر قطر فصل ثاني 2024 pdf

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Introduction
You are about to commence a vocational course where you will be required to demonstrate your competency in creating simple two table relational databases with reports and queries, for the storage and retrieval of information.
A database is a collection of information organized in such a way that a computer program can quickly select desired pieces of data. You can think of a database as an electronic filing system.
Traditional databases are organized by fields, records, and files. A field is a single piece of information; a record is one complete set of fields; and a file is a collection of records. For example, a telephone book is analogous to a file. It contains a list of records, each of which consists of three fields: name, address, and telephone number.
To access information from a database, you need a database management system (DBMS). This is a collection of programs that enables you to enter, organize, and select data in a database.

What is the difference between a spreadsheet and a database?
A spreadsheet is an application used for entering data into a table, while a database is where data is stored so that it can be retrieved by users.
The amount of data that is normally contained in a database is considerably more than what is stored in a spread sheet.
A spreadsheet is edited directly be people, while a database is accessed by applications that enter and modify data.
A spreadsheet is often used for presentations and calculations, while databases are commonly used in cases where a lot of data needs to be stored.
Excel is considered a spreadsheet application, while Access is considered a 'relationship database management system.
We will be using the Microsoft Office Access database application throughout this unit.