Porovnání vybraných open source databázových systémů

The goal of this work is to bring comparison of significant Open Source relational database systems and one proprietary system. The comparison of the systems consists of functional comparison according to the actual trends in relational database systems and furthermore on performance testing, which will show up how efficient are single systems during execution of various commands and for which situations it is appropriate to use them. This work can be divided to three parts. First part is focused on overview of the market situation, choice of the systems intended to compare and introduction of the systems in light of their history, present state and future trends. Comparison criteria, database model for SQL commands testing and methodology of testing process are determined in the second part of this work. And finally results of the comparison and performance testing are in the third part of this work. Benefits of this work can be seen from several different viewpoints. The first aspect is the comparison of single Open Source database systems and retrieval of differences between them. Next aspect is comparison of Open Source products with proprietary system, where the source code can be considered as a business secret. Last but not least aspect is comparison of single types of commands themselves, whereof reader will obtain overview, which commands and language constructs can be used and which ones should be avoided.