Digital warehouse: on the construction practice of digital warehouse in banking industry

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brief introduction

Data warehouse , To engage in IT Industry practitioners are not a strange term , This concept was created by the father of data warehouse Bill Inmon stay 1991 Published in 2002 “Building the Data Warehouse” As defined in —— Subject oriented 、 Integrated 、 Relatively stable 、 A collection of data reflecting historical changes , Used to support decision management . From the definition we can see that , Data warehouse has the following key features ：

• subject-oriented
  The data warehouse collects the data of the whole bank and sorts it out according to specific topics , It is convenient for users to catalog by topic, find the required data quickly and use ;
• Data integration
  The data warehouse collects the data of the whole bank , Break the data island between systems , So as to provide strong data support for subsequent decision management and data services ;
• Relatively stable
  When building data applications , The biggest concern is that changes in the data model of the source system lead to “ Pull one hair and move the whole body ”. Every model change is accompanied by