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.
How much does an Engineer in the United States make? The average Engineer salary in the United States is approximately $88,879 per year. Salary information comes from 59,494 data points collected directly from employees, users, and past and present job advertisements on Indeed in the past 24 months.