SQL> start lab6 COUNT(*) ---------- 6 COUNT(DISTINCTCLASSROOM) ------------------------ 3 CLASSROOM COUNT(*) ---------- ---------- 110 6 105 5 102 7 109 8 104 4 108 2 103 5 112 3 107 6 106 7 101 3 111 4 12 rows selected. GRADE COUNT(*) ---------- ---------- 6 3 5 8 1 12 3 6 2 3 0 16 4 12 7 rows selected. GRADE COUNT(*) ---------- ---------- 0 16 CLASSROOM FIRSTNAME LASTNAME ---------- --------------- --------------- 109 GORDON KAWA SQL> spool off