InfoWorld (A US computer magazine) recently posed this:

http://weblog.infoworld.com/techwatch/archives/001018.html

The Evans Data report is here:
http://evansdata.com/n2/pr/releases/EDCDB05_01.shtml

Rick

January 25, 2005
Open Source Database Market Share Breakdown

Evans Data revealed the results of a study on open source databases.
While the familiar names MySQL and PostgresSQL were in there, the
biggest surprise may be that Firebird was nearly tied for the most
used open source database.

Here are the rankings found in Evans' Database Development Survey
2005, Winter:

MySQL -- 53%
Firebird -- 52%
PostgresSQL -- 15%
Berkeley DB -- 4%
GNU SQL -- 3%
SAP DB -- 1%
Other -- 6%

Some survey respondents are using use more than one open source
database, thus the total exceeds 100%.
Posted by Tom Sullivan at January 25, 2005 08:29 AM