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.
Computer Engineering. The median starting salary for a computer hardware engineer is $63,970Â¹. This is a relatively new field of engineering and some sources say that there are not enough computer engineers to keep up with demand while other sources say that the job growth for computer engineers will be below the national average. As schools start producing more computer engineers, the job growth rate could potentially slow. A computer engineer can anticipate earning a mid-career salary of $101,000Â¹. Most technological breakthroughs are coming in the area of software engineering and not computer hardware, so keep that in mind as well.