Have EOC/SQL/DB/Queries -- next?

[imp34]

So here is what I have done and what I am getting more comfortable with:

--Connected to EOC (WHEW!)
--Using HeidiSQL to make queries on the PEQ DB. I think I'm comfortable finding another DB to find and modify (which I'll probably do).
--Logging into my LAN server using the invaluable guides found on here and the github stuff.

Now... here's my question:

Once I start modifying the PEQ DB (or whichever DB I use in the future) on Heidi and EOC... how do I take those changes (the DB) and apply them to my client/server? I'll settle for a link or someone pointing me in the direction of this next step. I'm having a hard time finding anything.

EDIT

I understand that there's a difference between the "login/client" and the "server". Can someone explain to me how the DB (the thing I'm modifying with EOC and MySQL, right?) and the "server" that the login are logging into become the same thing? Or am I not understanding this correctly?