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ERD examples

ERD or Entity relationship diagram is the most common database design and modelling tool used in System Design phase. The diagram basically represents all data...

DFDs example

Data Flow Diagram is the widely used system design tool which aids in depicting flow of logic and data (commonly called process flow) within the...

Use Case Building – An example

Use cases are one of the excellent tools for representing functional requirements of a system. Use case modelling refers to modelling of system’s functions in...

What is IT?

We have seen so much about IT and all of us have been a part of it by some means or other. We all know...

Information Management and career levels

Deepesh JosephAugust 2006 Information Management (IM) refers to any activity that leads to effective collection, storage, retrieval and analysis of information by focusing on business...

Compare and contrast data warehouse principles

Operational Vs Informational system : Operational Systems are those which are based on current data and thus supports current/day-to-day functioning of a business. Informational Systems...

Various kinds of Database Systems

a. Homogeneous vs. heterogeneous distributed database system Homogeneous database systems involve similar databases distributed over the network (on separate machines). Example of homogeneous database system...

Pros and Cons of normalizing data into 3NF form

Deepesh Joseph February 2009 The main purpose of normalization is to reduce data redundancy and avoid inconsistent data. Normalization leads to separation of unrelated entities...