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. For other uses, see Barack (disambiguation) and Obama (disambiguation). Barack Hussein Obama II (US /bÉËrÉËk huËËseÉªn oÊËbÉËmÉ/ bÉ-RAHK hoo-SAYN oh-BAH-mÉ; born August 4, 1961) is an American politician who served as the 44th President of the United States from 2009 to 2017.