c/c++ --- basic
vb.net --- basic
sql ---basic
php ---learning soon
java --- learning soon
which1 is the best ya ~?
haha...
there is no "best" language.
u must define yourself what language to use based on the project scope itself.
some project best suitable to be developed in Java, and some may be not.
my suggestion is: try to know as much programming language as u can. BUT master any one of them.
for me, i m trying to master the Java programming language, coz its the easiest 1.

haha.

and for industry demand in Malaysia, expertise in these language will have better chance to get a job:
i) .net -- c#, vb.net, including ASP.net (c# more famous in industry...)
ii) Java -- especially J2EE (one of the most demanded)
iii) PHP -- this is most popular in industries (so if you are saying u r a comp science or IT student, industry are expecting you to KNOW PHP)

iv) make sure you know what is LAMP technology (bukan teknologi lampu arr...

)
lastly, just be prepared yourself 100% when you are in industry, coz u will never know what weired technology the company is using. (u might never heard about those technologies!) but don worry and don be scared. haha.