  Database management systems are today's most reliable mean to organize data
into collections that can be searched and updated. However, many DBMS systems
are available on the market each having their pros and cons in terms of
reliability, usability, security, and performance. This paper presents a
comparative study on the performance of the top DBMS systems. They are mainly
MS SQL Server 2008, Oracle 11g, IBM DB2, MySQL 5.5, and MS Access 2010. The
testing is aimed at executing different SQL queries with different level of
complexities over the different five DBMSs under test. This would pave the way
to build a head-to-head comparative evaluation that shows the average execution
time, memory usage, and CPU utilization of each DBMS after completion of the
test.
