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: Life Before the Presidency. Barack Obama: Life Before the Presidency. Barack Hussein Obama II was born on August 4, 1961, in Hawaii. His parents, who met as students at the University of Hawaii, were Ann Dunham, a white American from Kansas, and Barack Obama, Sr., a black Kenyan studying in the United States.