Find the average sales amount per sales quarter.
mysql>
mysql> CREATE TABLE duck_sales(
-> design_num MEDIUMINT NOT NULL AUTO_INCREMENT,
-> design_name CHAR(20),
-> winter_sales INT,
-> spring_sales INT,
-> summer_sales INT,
-> fall_sales INT,
-> design_category CHAR(13),
-> primary key(design_num)
-> );
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> insert into duck_sales(design_name, winter_sales, spring_sales, summer_sales, fall_sales, design_category)values
-> ("Duck",1067,200,150,267,"Holiday"),
-> ("Mac",970,770,531,486,"Profession"),
-> ("Duckula",53,13,21,856,"Literary"),
-> ("iPhone",782,357, 168, 250,"Profession"),
-> ("HTML",589,795, 367, 284,"Holiday"),
-> ("SQL",953,582, 336, 489,"Literary"),
-> ("Sherlock_Duck",752,657, 259, 478,"Literary"),
-> ("XML",67,23, 83 ,543,"Holiday"),
-> ("Database",673,48,625,52,"Profession");
Query OK, 9 rows affected (0.00 sec)
Records: 9 Duplicates: 0 Warnings: 0
mysql>
mysql>
mysql> SELECT AVG(winter_sales) AS "winter avg ",
-> AVG (spring_sales) AS "spring avg ",
-> AVG (summer_sales) AS "summer avg ",
-> AVG (fall_sales) AS "fall avg "
-> FROM duck_sales;
+-------------+-------------+-------------+-----------+
| winter avg | spring avg | summer avg | fall avg |
+-------------+-------------+-------------+-----------+
| 656.2222 | 382.7778 | 282.2222 | 411.6667 |
+-------------+-------------+-------------+-----------+
1 row in set (0.00 sec)
mysql>
mysql>
mysql> drop table duck_sales;
Query OK, 0 rows affected (0.00 sec)
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