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.
According to the Bureau of Labor Statistics May 2015 records, the mean annual computer software engineer salary is $100,690. In other words, the staggering number of 1,114,000 engineers employed in this field earned an average hourly wage of $48.41.