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 Hussein Obama II (US: /bÉËrÉËk huËËseÉªn oÊËbÉËmÉ/ ( listen) 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. He is the first African American to have served as president.