IT Olympiad Nepal is organizing the Nationwide Quiz Contest 2022.
The quiz contest will represent representatives from 7 provinces in Nepal including 50+ districts and 500+ schools. The expected number...
What is Data preprocessing?
Data preprocessing is a data mining technique that involves transforming incomplete, inconsistent, and/or noisy data which increase chances of error and...
What is Data Mart?
Data mart is subset of data warehouse oriented to particular business subject line. The data mart contains repository of summarized data...
In several sectors, data mining and knowledge discovery is becoming a critical technology for businesses and researchers. While data mining is becoming a well-established...
Data sets are made up of data objects. A data object represents an entity. Examples: – sales database: customers, store items, sales – medical database: patients,...
Knowledge Discovery in Databases (KDD)
Knowledge Discovery in a database is the process of discovering useful knowledge from a collection of data .This widely used...
Motivation for Data Mining
Over the last three decades, the steady and remarkable advancement of computer hardware technology has resulted in a large supply of...
Components of Data Warehouse
A typical data warehouse consists of four major components: a central database, ETL (extract, transform, and load) tools, metadata, and access...
Three-tier data warehouse architecture is the most widely used architecture of data warehouse as it produces a well-organized data flow from raw information to...
The conceptual data model is a structured business view of data required to support business, processes,record business events and track related performance measures. This...
A data warehouse is a repository of information collected from multiple heterogeneous sources and placed in a single site in order to facilitate management...
There are three main types of data:
Record
Data MatrixDocument DataTransaction Data
Graph
World wide webSocial Network
Ordered
Spatial DataTemporal DataSequential DataGenetic Sequence Data
Record Data
Data that consists of a collection...
