Prior to the introduction of AutoCAD, most commercial CAD programs ran on mainframe computers or minicomputers, with each CAD operator (user) working at a separate graphics terminal. AutoCAD is used across a wide range of industries, by architects, project managers, engineers, graphic designers, and other professionals. It is supported by 750 training centers worldwide as of 1994.
Aggregate Functions (Transact-SQL) Aggregate functions perform a calculation on a set of values and return a single value. Except for COUNT, aggregate functions ignore null values. Aggregate functions are frequently used with the GROUP BY clause of the SELECT statement. All aggregate functions are deterministic.
An enterprise database is used by enterprises and large organizations to manage their huge collection of data. Such a database helps companies improve their efficiency. An enterprise database is robust enough to successfully handle the queries of multiple users simultaneously, and is capable of handling a range of 100 to 10,000 users at a time.