The database management system DB2 is distributed for various platforms. Actually there are offerings for IBM-Mainframes (z/OS), fort he operating systems Linux, Unix and Windows and for IBM Midrangesysteme. DB2 manages data in tables and store them in tablespaces. Besides standard SQL data types DB2 supports also text, tones, picutres, videos and XML data. To ensure best performance DB2 uses an optimizer.
http://www-01.ibm.com/software/data/db2/
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