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--- faq:what_is_postgresql [2009/05/15 19:22] – created paul
+++ faq:what_is_postgresql [2018/11/14 10:45] (current) – external edit 127.0.0.1
@@ Line 9: / Line 9: @@
 We evaluated several database systems for use in VPOP3. Because of the low cost of VPOP3 it was necessary to consider the cost of the database system. Obviously, it wouldn't be practical for a 5 user copy of VPOP3 (costing £50) to require a database system which costs £500 to licence.
-Some open source software, such as MySQL, is licenced using a '[[http://www.gnu.org/copyleft/gpl.html|GPL]]' licence. This means that it can be used in other GPL projects free of charge. VPOP3 is not GPL. To use MySQL in VPOP3 would require a commercial licence for each installation of VPOP3, which would be prohibitively expensive. (There are also [[http://en.wikipedia.org/wiki/Mysql#Criticism|other issues with MySQL]]).
+Some open source software, such as MySQL, is licenced using a '[[http://www.gnu.org/copyleft/gpl.html|GPL]]' licence. This means that it can be used in other GPL projects free of charge. VPOP3 is not GPL. To use MySQL in VPOP3 would require a commercial licence for each installation of VPOP3, which would be prohibitively expensive. (There are also [[http://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems|other issues with MySQL]], also see [[http://www.wikivs.com/wiki/MySQL_vs_PostgreSQL|MySQL vs PostgreSQL]]).
 SQLite, PostgreSQL and MSSQL Server Express were products we considered which had suitable licences.

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