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 Hardware Engineer Hourly Wage in the United States. Computer Hardware Engineers earn a median hourly wage of $55.33. Hourly wages typically start from $32.15 and go up to $82.70. Source: U.S. Department of Labor Bureau of Labor Statistics Average Computer Hardware Engineer Yearly Salary in the United States Computer Hardware Engineers earn a median salary of $115,080 per year. Salaries typically start from $66,870 and go up to $172,010.