INFORMATION SYSTEM, RELATIONAL MODEL

Kupas Tuntas Kuliah Jurusan Sistem Informasi

INFORMATION SYSTEM

System Basic Concept

A system is a totality consisted of two or more components or subsystems that interact to achieve some goal.

Some system may be consisting of subsystems. For example, a computer system may be consisting of subsystem hardware and subsystem software. Some subsystem may be consisting of smaller subsystems. Subsystem hardware may be consisting of input, process, output and external storage tool. Subsystems do mutual interacting and interrelating to form one totality so that goal or objectives of the system can be achieved. The subsystems do mutual interacting to achieve integrated totality.


Continued to System Characteristics

Source:

Jogiyanto HM. 2005. Pengenalan Komputer. Yogyakarta: Andi. Hlm. 683.
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RELATIONAL MODEL

In relational model, database is built around simple and most natural mathematical structure. The importants terms in relational model are relation, attribute, domain, tuple, arity, and cardinality (Hariyanto 2004: 31). As notes, tuple is similar with record and row in a file.

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