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, Democrat, (born August 4, 1961 in Honolulu,  Hawaii) officially became the forty-fourth President of the United  States, on January 20, 2009 and was re-electe â¦ d for a second term on  November 6, 2012. Barack Obama became president of the United States of America in  2009 and is the current president. Before he became president there  was George W. Bush and Bill Clinton.