SQL-runoob-function-sum

标签：function +-----+---------+-------+------------+ 14 05 sum runoob 2016 log

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)

从access_log表中选择count列, 求和, 新列名为nums

标签：function,+-----+---------+-------+------------+,14,05,sum,runoob,2016,log
From： https://www.cnblogs.com/albert-huang1/p/SQL-runoob-function-sum.html