收集了些有用的网址，今天要用

http://gql.sourceforge.net/
Database Template Library --> https://sourceforge.net/project/showfiles.php?group_id=17082
--> http://www.codeguru.com/cpp/data/mfc_database/dynamicdataaccess/article.php/c10629/
RudeDatabase --> http://www.rudeserver.com/database/download.html
Free Database or libraries --> http://www.thefreecountry.com/sourcecode/database.shtml
XML Library --> http://xerces.apache.org/xerces-c/
--> http://www.alphaworks.ibm.com/tech/xml4c XML4C --> xerces-c
Expat --> http://www.jclark.com/xml/expat.html
DB Access Library --> http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Relational_Database_Access