Data Modeling - History of Databases and ER Diagram

Running Head: DATA MODELING
DATA MODELING
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DATA MODELING1
Table of Contents
Assessment 2...................................................................................................................................2
Part A...........................................................................................................................................2
Part B...........................................................................................................................................3
References........................................................................................................................................5

DATA MODELING2
Assessment 2
Part A
History of databases
Database is the systematic assembly of many data. The databases provide the storage and
manipulation of these data. The management of data is made simple using the database. The
concept of storing and sorting the data is very old and the idea of databases dates back to the
1950s and in organizations, the database system were used (Jukic, Vrbsky & Nestorov, 2016).
In the 1960s, the computer systems gained popularity and the private organizations
started using the computers to store more organizational data (Berg, Seymour & Goel, 2012).
Computers increased the data storing capacity. The term database came into consideration
through the introduction of direct-access storages, like the disks and drums. Tape based storages
were not so convenient to use required a lot of effort to store and process the data. In this period
two data models were established, one is the network model CODASYL (Conference on Data
System Language) and the other one is the hierarchical model IMS (Information Management
System). The primitive way of accessing the data from these databases were done by using
pointers from one record to the other.
In the 1970, the relational database model was developed by E.F Codd. The searching of the data
in these databases were by done by using the contents. These databases included tables. In the
year 1976, P. Chen proposed a new database model which is popularly known as Entity
Relationship or just ER. During this period, the term RDBMS (Relational Database Management
System) was coined (Băzăr & Iosif, 2014).