A short and comprehensive guide to data warehousing and OLAP operations

What is a data warehouse?

“A data warehouse is a subject ‐oriented, integrated, time ‐variant, and nonvolatile collection of data in support of management’s decision ‐making process [Inm96].” — W. H. Inmon

What is a data warehouse exactly? Simply it is a decision support database that is maintained separately from the organization’s operational database. And…

Chanika Ruchini

Software Engineer @ WSO2 | CSE @University of Moratuwa

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