Having with avg
SQL> SQL> create table ord( 2 order_no integer primary key 3 ,cust_no integer 4 ,order_date date not null 5 ,total_order_price number(7,2) 6 ,deliver_date date 7 ,deliver_time varchar2(7) 8 ,payment_method varchar2(2) 9 ,emp_no number(3,0) 10 ,deliver_name varchar2(35) 11 ,gift_message varchar2(100) 12 ); Table created. SQL> SQL> SQL> insert into ord(order_no,cust_no,order_date,total_order_price,deliver_date,deliver_time,payment_method,emp_no,deliver_name,gift_message) 2 values(1,1,'14-Feb-2002', 23.00, '14-Feb-2002', '12 noon', 'CA',1, null, 'Gift for wife'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time ,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(2,1,'14-Feb-2003', 510.98, '14-feb-2003', '5 pm', 'NY',7, 'Rose Ted', 'Happy Valentines Day to Mother'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(3, 2,'14-Feb-2004', 315.99, '14-feb-2004', '3 pm', 'VS',2, 'Ani Forest', 'Happy Valentines Day to Father'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(4, 2,'14-Feb-1999', 191.95, '14-feb-1999', '2 pm', 'NJ',2, 'O. John', 'Happy Valentines Day'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(5, 6,'4-mar-2002', 101.95, '5-mar-2002', '2:30 pm', 'MO' , 2, 'Cora', 'Happy Birthday from John'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(6, 9,'7-apr-2003', 221.95, '7-apr-2003', '3 pm', 'MA', 2, 'Sake Keith', 'Happy Birthday from Joe' ); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(7, 9,'20-jun-2004', 315.95, '21-jun-2004', '12 noon', 'BC', 2, 'Jessica Li', 'Happy Birthday from Jessica'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values (8, 12, '31-dec-1999', 135.95, '1-jan-2000', '12 noon', 'DI', 3, 'Larry', 'Happy New Year from Lawrence'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values (9, 12, '26-dec-2003', 715.95, '2-jan-2004', '12 noon', 'SK',7, 'Did', 'Happy Birthday from Nancy' ); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(10, 4, sysdate-1, 119.95, sysdate+2, '6:30 pm', 'VG',2, 'P. Jing', 'Happy Valentines Day to Jason'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message ) 2 values(11, 2, sysdate, 310.00, sysdate+2, '3:30 pm', 'DC',2, 'C. Late', 'Happy Birthday Day to Jack'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message) 2 values(12, 7, sysdate-3, 121.95, sysdate-2, '1:30 pm', 'AC',2, 'W. Last', 'Happy Birthday Day to You'); 1 row created. SQL> insert into ord(order_no ,cust_no ,order_date ,total_order_price ,deliver_date ,deliver_time,payment_method ,emp_no,deliver_name ,gift_message) 2 values(13, 7, sysdate, 211.95, sysdate-4, '4:30 pm', 'CA',2, 'J. Bond', 'Thanks for hard working'); 1 row created. SQL> SQL> SQL> select to_char(order_date, 'YYYY/MM') "Month", 2 avg(total_order_price) "Avg Sales by Month" 3 from ord 4 group by to_char(order_date, 'YYYY/MM') 5 having avg(total_order_price) > 35; Month Avg Sales by Month ------- ------------------ 2003/02 510.98 2004/02 315.99 2002/03 101.95 2008/06 190.9625 1999/02 191.95 2003/04 221.95 2004/06 315.95 2003/12 715.95 1999/12 135.95 9 rows selected. SQL> SQL> SQL> drop table ord; Table dropped. SQL> --