DESAIN DATABASE

DESAIN DATABASE

(MODEL RELASIONAL DAN DESKRIPSI ATRIBUT)

4.1. Tujuan desain database.

           Database (database) is a collection of data that are related to each 

other, stored in stash out computers and specific software used to 
manipulate it. The database is one of the important components in 



information systems, because it serves as a base for the information 


provider of the wearer. Penerapa databases in information systems is 



this is an information system that integrates a collection of data that 
called with the database system. The system database (database system) 
are interconnected with each other and make it available to multiple 



information generated can be fulfilled properly. There are several 
applications varying in an organization. The purpose of the database 
design is to determine the required data in the system, so that 
reasons why database design needs to do, one is to avoid the repetition 



lossless. Needed if there are indications that a table that we created 
of the data. As for the methods to manage the repetition of data (data 
redudancy) with, among others: 

a. Normalization. 

b. decomposition is 
is not good (the repetition of information, the potential for 
inconsistency of data conversion operations, its specific information) 



relationships.
and is needed so that if the tables are decomposed we merge return can 
generate the table before decomposed, so the retrieved table.

c. ERD 



(Entity Relationship Diagram). 

d. Determining kardinalitas 



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