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.
Average Computer Systems Engineer Yearly Salary in the United States. Computer Systems Engineers earn a median salary of $85,240 per year. Salaries typically start from $45,320 and go up to $129,700. Learn more about the Computer Systems Engineer job market for salaries of real jobs in your area.