TABLE 4: Session Groups' End Times
Username Endtime
User1 2001-12-01 09:30:00
User1 2001-12-01 12:30:00
User2 2001-12-01 10:30:00
User2 2001-12-01 11:30:00
User2 2001-12-01 12:00:00
User2 2001-12-01 12:30:00
User3 2001-12-01 09:00:00
User3 2001-12-01 09:30:00