B.1 Overview
Database systems technology has advanced a great deal during the past five decades from the legacy systems based on network and hierarchical models to relational database systems to object databases and more recently big data management systems. We consider a database system to include both the database management system (DBMS) and the database (see also the discussion in [DATE90]). The DBMS component of the database system manages the database. The database contains persistent data. That is, the data are permanent even if the application programs go away.
We have discussed database systems in this appendix as it is at the heart of big data technologies. For example, the supporting technologies ...
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