This lecture addresses the basic theory, the design and creation of databases. The most important objective of this lecture is to develop basic knowledge and skills for designing and creating databases with experimental practice. It is essential to study how to analyze, store, retrieve and integrate data in a database system environment. An actual database system((PostGres) and database language SQL are used to create experimental databases and applied it to WWW system environments. We also study and design a multimedia database system amd a data mining system as new database technology.