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.
Obama Makes History. President Barack Obama was elected the first African-American president of the United States on November 5, 2008, transcending centuries of inequality in America.1  Contents. 2  Early life.3  Pre-Election Career.resident Barack Obama was elected the first African-American president of the United States on November 5, 2008, transcending centuries of inequality in America. 1  Contents. 2  Early life. 3  Pre-Election Career.