In a distributed database system, a program often referred to as the database's back end runs constantly on a server, interpreting data files on the server as a standard relational database. Programs on client computers allow users to manipulate that data, using tables, columns, rows, and fields.
A solar energy system big enough to power a computer and a few other small items might cost you about $700 to $1000. These are also well suited for RVs, boats and camping. Learn more about portable solar energy units.
A bright idea gets cheaper. Since 2007, the cost to buy a solar power system has fallen by about 50%, to an average upfront cost of $4,590 per kilowatt, says the Solar Energy Industries Association (a typical home system ranges from 3 kW to 7 kW). You would recoup your upfront cost in an average of seven to 15 years, the Solar Foundation reports.