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.
With an average salary of $85,930 in 2013, mechanical engineers are filling their coffers at a higher rate than a number of other technology jobs. Computer programmers, by comparison, make $80,930.The gap is wider for computer support specialists, who earn an average annual salary of $64,160.Still, some technology jobs, like information security analysts ($91,210) and IT managers ($132,570), earn more than mechanical engineers.ith an average salary of $85,930 in 2013, mechanical engineers are filling their coffers at a higher rate than a number of other technology jobs. Computer programmers, by comparison, make $80,930.