This bachelor work deals with projecting and implementation of the demo test database, which is used for training work with relational databases. A set of educational queries submissions which enable practising query language SQL (Structured Query Language) is one part of the work. There is a well-arranged table of correct output from data test for all of queries allowing to check correct query setting. In the theoretical part there is a short mention about the principles of databases projecting and data modelling, especially about the "Three schema approaches".Tato práce se zabývá návrhem a tvrobou testovací demo databáze, která slouží pro výuku práce s relační databází. Součástí práce je sada zadání výukových dotazů, na kterých je možno p...