The goal of this thesis is the analysis and design of a database for a particular company, which operates in the brokerage of investments. Company needs to cover its need for a structured storage of informations about investors. The main focus of this thesis is therefore accurate analysis of the current requirements of the company, identification of users and use cases of database applications. On these bases are created three models using the methodics "The principle of the three architectures (P3A)". The model reflects the anticipated use of the service applications and these are adapted to it. The resulting database is thus defined with the relevant restrictions and the entire database is ready to create for target DBMS (Microsoft SQL Se...