How many adults stay in the room CONRAD SELBIG checked in on Oct 23, 2010?
SELECT Adults FROM Reservations WHERE CheckIn  =  "2010-10-23" AND FirstName  =  "CONRAD" AND LastName  =  "SELBIG";
number of adults = Adults; CONRAD SELBIG refers to FirstName = 'CONRAD' AND LastName = 'SELBIG'; checked in on Oct 23, 2010 refers to CheckIn = '2010-10-23';