almost all my scripts ive made are used for storing information about various stuff, and for that there is no way using files/hash tables etc to be effecient, especialy not if i want to sort the result or doing anything more complex. mirc is good when you dont have many "colums" in your database, i have like 70 colums in some of my data containers which means i have to use lots of $gettok hacks and use sortable windows to get the output the way i want it.
with database functionality however this could be alot less, eg; the query and a while loop.
