SQL queries that use EXISTS and NOT EXISTS are ________

What is it called when services for those in relatively poor economic situations are largely paid for by those who are in better financial situations?

a. nonfinancial pricing b. indirect payment c. indirect distribution d. separation between payers and users

Which of the following is an example of a public-sector only union?

a. Service Employees International Union b. The National Education Association c. The American Federation of State, County, and Municipal Employees d. International Brotherhood of Teamsters