I am also new but i can answer few of your questions.
- How do I read the data from MySQL? I don't understand how entries are
connected to one another and how I should read it.
Have a look at this: http://www.mediawiki.org/wiki/Category:MediaWiki_database_tables
- Do I have to clean up MySQL tables every time I want to insert
another dump? Either an update file or totally different one?
I did this :(, eats up a lot of my time. If anyone can help that would be grt.
- Is there a way to get only the delta file instead of the whole dump
again?
- How do I add .sql.gz files to MySQL?
$gnuzip <filename>.sql.gz $mysql -u (username) -p (db-name) < (filename).sql
Hope this help.
Regards,