This work discuses complex rule systems, integrity constraints implementation issues. It describes all integrity constraints and their types. Showed their representation in UML concepts also ORACLE PL/SQL system code. Analysed realization possibilities of integrity constraints. Realized in database system and enforced testing process in this database of integrity constraits. Introduces users helpfull methodology about peration issues, possibilities and methods. Managed system of integrity constains creating templates. In some ways program generates PL/SQL code by users defined variables.