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Find the average of column values in MySQL using aggregate function
Let us first create a table −
mysql> create table DemoTable ( Number int ); Query OK, 0 rows affected (0.79 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(56); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(78); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(89); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(98); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(91); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable values(96); Query OK, 1 row affected (0.15 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+--------+ | Number | +--------+ | 56 | | 78 | | 89 | | 98 | | 91 | | 96 | +--------+ 6 rows in set (0.00 sec)
Following is the query to get the average of column values −
mysql> select (sum(Number)*(100))/(100+500) from DemoTable;
This will produce the following output −
+-------------------------------+ | (sum(Number)*(100))/(100+500) | +-------------------------------+ | 84.6667 | +-------------------------------+ 1 row in set (0.00 sec)
Updated on: 26-Sep-2019
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