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.
*Luo Kenyan (father) *English, small amounts of Scottish, Irish, German, Welsh, Swiss-German, French, possibly remote African (mother) Barack Obama is an American politician. A member of the Democratic Party, he served as the 44th President of the United States, from January 20, 2009 to January 20, 2017.