Aggregate functions occur commonly in numerous programming languages, in spreadsheets, and in relational algebra. See also Cross-tabulation a.k.a. Contingency table
Barack H. Obama is the 44th President of the United States. His story is the American story â values from the heartland, a middle-class upbringing in a strong family, hard work and education as the means of getting ahead, and the conviction that a life so blessed should be lived in service to others.
Barack Obama is the 44th President of the United States and the first African-American to ever hold the office. Although Obama was only 48 years old when he assumed the office of president, he has a relatively long history of public service both in the Illinois State Senate and in Congress as an Illinois senator.