Database Primary Key: A primary key is a combination of one or more column values in a table that make a row of data unique within a database table. Identification of primary keys is an important part of entity type identification. Ideally, primary keys should be. stable and.
It depends on their experience, the industry of their clients, what their special â¦ ty is, their location, etc., etc.According to the U.S. Department of Labor, the 2002 median annual earnings of salaried computer programmers was $60,290.
As a result, salaries are getting pushed rapidly upwards, with the average computer engineer salary above $100,000 in Silicon Valley. When you add in bonuses and stock options, it's possible for an engineer in the Bay Area to earn in the six figures right out of school.or example, optometrists earn an average $94,000 a year, while m ath and computer science professors earn $72,000 a year and p sychologists make $63,000. That might be reason enough to change your major.