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.
1 According to the U.S. Department of Labor, the 2002 median annual earnings of salaried computer programmers was $60,290. 2  The middle 50 percent earned between $45,960 and $78,140 a year. 3  The lowest 10 percent earned less than $35,080; the highest 10 percent earned more than $96,860.