No two dialects of SQL are exactly the same, but for the most part they tend to stay pretty close to the ISO standard for SQL. Like most things with computers:
1) Learning the first SQL dialect is hard because it is your first dialect.
2) Learning the second SQL dialect is hard because it is not your first dialect.
3) Learning the third and later SQL dialects are comparatively easy.
By default, DBForums users can post in any forum that they can see... There may be exceptions, but give it a shot and if you have problems send me a private message or post back here and someone ought to respond!
-PatP