MIS271 Lecture Notes - Lecture 3: Data Validation, Big Data, Decision Support System
8 Aug 2018
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Document Summary
Dw is a decision support database that is maintained separately from the organisations operational database; support information processing by providing a solid platform of consolidated, historical data for analysis. (cid:862)a data (cid:449)arehouse is a su(cid:271)je(cid:272)t-oriented, integrated, time-variant and non-volatile collection of data i(cid:374) support of (cid:373)a(cid:374)age(cid:373)e(cid:374)t(cid:859)s de(cid:272)isio(cid:374)-making pro(cid:272)ess(cid:863) Data warehousing is the most used info management tech. It is a network of databases from various systems (expanded version of big data systems: bi systems have an inhouse generated data. (significant proportion is outsourced) Data is outsourced in the instance to broaden the perspective of the company through the inhouse data, and gain a broader insight through other relevant data from outside. Thus, a data warehouse is created: a data warehouse, within a typical it system/ transactional system: data is generated on the go. Thereby, when the transaction is made, data will be automatically stored: purchase data from data agents; collect your data, build the profiles and sell you the data.
