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.
Democrat from Illinois. Barack Obama is the former president of the United States. Obama also served as a U.S. senator from Illinois. He was born in 1961 in Hawaii, where his parents met as students at the University of Hawaii. Obama's father is from Kenya and his mother is from Kansas. He graduated from Columbia University and received his law degree from Harvard Law School.