1. ISOM Comparison of Relational database management systems Arijit Sengupta

2. ISOM Who are the main contenders? Commercial software  Sybase Adaptive Server Enterprise  IBM DB2  Oracle  Microsoft SQL Server  Teradata Free/GPL/Opensource:  MySQL  PostgreSQL

3. ISOM Things to consider when deciding on a DBMS Price Operating System Support Most important features (ACID, Referential Integrity support, Transactions support) Other important features (Indexes, materialized view support, trigger support) Scalability and security Availability of support and software

4. ISOM Vendor leaders For low-medium level servers, Oracle is the leader in the market share, although growth is declining IBM DB2 has the highest market share for high-end servers and mainframes, increasing growth in midrange after acquisition of Informix Revenue2001200220032004 IBM$2,419 M$2,400 M$2,519 M$2,665 M Oracle$2,831 M$2,246 M$2,299 M$2,636 M Microsoft$1,020 M$1,191 M$1,323 M$1,561 M NCR$169 M$184 M$196 M$230 M Others$686 M$701 M$723 M$695 M Total$7,125 M$6,722 M$7,060 M$7,787 M

5. ISOM Operating System Support WindowsMac OS XLinuxBSDUNIX Adaptive Server EnterpriseYes DB2YesNoYesNoYes Microsoft SQL ServerYesNo MySQLYes OracleYes NoYes PostgreSQLYes TeradataYesNoYesNoYes

6. ISOM SQL Server (Express) Express version free and redistributable, license to commercial version varies between $600 to $10000 Support for Windows only Express version limited to one CPU and single user thread  Limited features, but scales easily to Enterprise version  Comes with all standard SQL tools  Email support

7. ISOM Oracle 10g Standard Edition v10.2.0.1 Free download for non-profit, non- commercial use Approximately $15000/cpu for commercial use Support for most operating systems Very strong support and service Weak user interface, complex installation and maintenance process

8. ISOM MySQL No limit on # of CPUs, fully featured, support for several OSs $0 without Support, approx. $600- $6000 for subscription-based support Highly scalable, provides support for most types of indexes and storage methods

9. ISOM IBM DB2 Express v8.2 Free for non-commercial use, $6000 per CPU unlimited users Express version limited to 2 CPUs. Support for Windows, Linux and Unix Strong features set, very good user interface Limited support but can be purchased for additional cost

10. ISOM Database comparison charts on the NET http://www.geocities.com/mailsoftware42/db/ http://www.builderau.com.au/architect/databa se/soa/Road_test_Four_databases_tested/0, 39024547,39224962-7,00.htmhttp://www.builderau.com.au/architect/databa se/soa/Road_test_Four_databases_tested/0, 39024547,39224962-7,00.htm http://en.wikipedia.org/wiki/Comparison_of_r elational_database_management_systemshttp://en.wikipedia.org/wiki/Comparison_of_r elational_database_management_systems

11. ISOM References http://en.wikipedia.org/wiki/ http://www.sybase.com http://www.oracle.com http://www.teradata.com/ http://www- 306.ibm.com/software/data/db2/http://www- 306.ibm.com/software/data/db2/ http://www.microsoft.com/sql/ http://www.mysql.com http://www.postgresql.com