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Get the Average of Average in a single MySQL row?
You can use aggregate function AVG() for this. Let us first create a table −
mysql> create table DemoTable ( Value1 int, Value2 int, Value3 int ); Query OK, 0 rows affected (0.54 sec)
Insert records in the table using insert command −
mysql> insert into DemoTable values(10,20,30); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable values(13,15,18); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(21,31,41); Query OK, 1 row affected (0.21 sec)
Display records from the table using select command −
mysql> select *from DemoTable;
This will produce the following output −
+--------+--------+--------+ | Value1 | Value2 | Value3 | +--------+--------+--------+ | 10 | 20 | 30 | | 13 | 15 | 18 | | 21 | 31 | 41 | +--------+--------+--------+ 3 rows in set (0.00 sec)
Following is the query to display average of average in a single row −
mysql> select avg(Value1+Value2+Value3)/3.0 from DemoTable;
This will produce the following output −
+-------------------------------+ | avg(Value1+Value2+Value3)/3.0 | +-------------------------------+ | 22.11111111 | +-------------------------------+ 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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