I find in the classes we teach, it takes 2 or 3 days. It's not just syntax, you also have to learn to think in terms of SETS instead of Procedurally.

You might want to try the SQL Tutoral at:
[w3schools.com ]

what type of "mysql basics" are you interested in?
install and setup?
admin?
programming?
data model?

And then there's of course our own SQL Databases [webmasterworld.com] forum.