SQL SUM() Function

SUM() Function

SUM() The function returns the total number of a numeric column.

SQL SUM() syntax

SELECT SUM(column_name) FROM table_name;

Demo database

In this tutorial, we will use the php sample database.

The following is the data selected from the "access_log" table:

mysql> SELECT * FROM access_log;
+-----+------ --+-------+------------+
| 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 |
+-----+---------+------+- -----------+
9 rows in set (0.00 sec)

SQL SUM() Example

The following SQL statement Find the total number of "count" fields in the "access_log" table:

Example

SELECT SUM(count) AS nums FROM access_log;

Execute the above SQL and the output result is as follows: