The article introduces an application which supports the education of database systems, particularly the teaching of SQL and PL/SQL in Oracle Database Management System environment. The application has two parts, one is the database schema and its content, and the other is a C# application. The schema is to administrate and store the tasks and the solutions, and it has a stored procedure which performs a syntactic verification of the solutions. The C# program helps the teacher organize the tasks and give feedback to the students. The main goal of the software application was to support the active learning method for database systems. With its help the students can practise alone, and they can get feedback from the teacher on their solutions