How do you upgrade sql?

Hi.

I run MANGOS ~Platinum~ Rev.2865 Mangoscript + SDB CHSet 35 RePack by DXP, and have came across some bugs.

Now i've downloaded 2976 update files and have no clue what todo with them..
I have very little knowlage of sql, and everytime I try and import the files into the database it all gets messed up big time, and console says alot of files missing..

Can someone explain to me how to upgrade your database with newer sql files, and explain it clearly please..

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respect and don't just wait for people to do the work for you. read and get informed especially when asking things which have been discussed zillion times.