I have longer term interests in offering my web site visitors database access features, but right now I want something so dirt simple that I may be insulting you by dropping my request here.
I have some stock market numbers that I update weekly. About 10,000 rows at most, but 5000 would be a good start. Maybe 5 variables (columns) besides the stock ticker symbol.
All I want to do right now is upload a flat file (.csv) with the data each week, and let my web site visitors put in one ticker symbol at a time, and the simple little interface would return the 5 data points. Repeat as often as required.