The concept of data bases. Physical and logical data independence. The data base administrator. Basic characteristics of data base handling languages. Classical data processing modes and the comparison of data base handling systems. The levels of data modelling. Tendencies in data modelling. The hierarchical, the netted, the relational data models.

Relational data models. Concept of the domain, the attribute, the record. Relation as a concept of Descartes series, as mapping, as a table. The key and is characteristics. The functional dependence and its properties, families. Decomposition and it's properties. The four normal forms. Normalisation. The operations of relational algebra.

Application of the dBase III language in data base handling.