remote.ini is the file where mIRC keeps variables, alongside other settings. Variables are not a good means of storing massive amount of information, for various reasons. If you're only looking for a better database, have a look at mIRC's hash table functions (/help hash tables).
If, however, it is necessary that the information be kept in an SQL database, you have two options: either find an SQL DLL for mIRC (by seaching scripting sites like
http://www.mircscripts.org and
http://www.mirc.net) or try your luck with Microsoft's data-access COM objects. Those can be accessed and manipulated (to a degree) with mIRC's COM functions. For more information on the COM option, search these forums for "
adodb". Look for posts written by Hammer
