Database for JSS3

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Database for JSS3

Definition of Database

1. A database is a collection of data organized in a manner that allows access, retrieval and uses of data.
2. A database is a collection of information that is organized so that it can easily be accessed, managed, and updated.
3. A database is an organized collection of data.
In a manual database, data can be recorded on paper and stored in a filing cabinet. While in a computerized database, it is stored in an electronic format on a storage media.
DBMS (Data Base Management System) is the application software that controls the data in the database. Examples of DBMS packages are: Dbase, Rbase, MS Access, Oracle, Paradox, SQL Server, SyBase, FOXPRO, IDMS, and System 2000.

Database Terminologies

1. Field: Field is a single piece of information about and object. A is also defined as a space that holds specific parts of data from a set or a record. Examples of fields are NAME, ADDRESS, QUANTITY, AGE, etc.
2. Record: A record is a collection of fields. It is the collection of information of a particular element, person or object.
3. File: This is the collection of related record
4. Database: Group of related record
5. Primary Key: a field in a table whose value is uniquely identifies each record in the table.
Forms of Database
1. Flat file: This type of database consists of table that is not complex to understand. This type of database can only handle single table database
2. Hierarchical Database: in this form of database, data are arranged or structured in form of a tree. . It can also be defined as a design that uses a one-to-many relationship for data elements. The data is stored as records are connected to one another through links
3. Network Model: This type of database allows the modeling of many-to-many relationship of data. In the network model of a database it is possible for a record to have multiple parents, making the system more flexible compared to the strict single parents of the hierarchical database.
4. Relational Model: A relational database is one that presents information in tables with rows and columns. Records are arranged in rows while fields are arranged in columns. Relational database is the most common type of database structure. It is used by most microcomputers.


Database Management System (DBMS) packages.
To start database in Microsoft Access, you do the following:
Step1: Click on the start button on the taskbar
Step 2: Move to all Programs,
Step 3: Click on MS Access
To open an existing Database, do the following:
Step 1: Click on file menu, then click open button
Step 2: Click on the file to be opened from the dialogue box.
Step 3: Then click on open or press enter on your keyboard.

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