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.
Of all engineering specialties, computer engineering jobs typically have some of the highest starting salaries. The BLS reported that in 2013, computer hardware engineers had a mean salary of $106,930. Hardware engineers in the 90th percentile for income made $154,810, while those in the 10th percentile made $64,620.