SQL AVG()
Function
AVG() Function
The AVG() function returns the average value of a numeric column.
SQL AVG() Syntax
Demonstration Database
In this tutorial, we will use the tutorialpro sample database.
Below is the data from the "access_log" table:
+-----+---------+-------+------------+
| aid | site_id | count | date |
+-----+---------+-------+------------+
| 1 | 1 | 45 | 2016-05-10 |
| 2 | 3 | 100 | 2016-05-13 |
| 3 | 1 | 230 | 2016-05-14 |
| 4 | 2 | 10 | 2016-05-14 |
| 5 | 5 | 205 | 2016-05-14 |
| 6 | 4 | 13 | 2016-05-15 |
| 7 | 3 | 220 | 2016-05-15 |
| 8 | 5 | 545 | 2016-05-16 |
| 9 | 3 | 201 | 2016-05-17 |
+-----+---------+-------+------------+
SQL AVG() Example
The following SQL statement gets the average value from the "count" column of the "access_log" table:
Example
Executing the above SQL outputs the following result:
The following SQL statement selects "site_id" and "count" where the access count is above the average access count:
Example
Executing the above SQL outputs the following result: