CREATE TABLE Reservations (Adults VARCHAR2, LastName VARCHAR2, CheckIn VARCHAR2, FirstName VARCHAR2)

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"
SELECT "Adults" FROM "Reservations" WHERE "2010-10-23" = "CheckIn" AND "CONRAD" = "FirstName" AND "LastName" = "SELBIG"