Mysql 具有distinct/count的简单sql查询_Mysql

Mysql 具有distinct/count的简单sql查询

mysql

Mysql 具有distinct/count的简单sql查询,mysql,Mysql,从测试中选择* +--------+------+ | name | age | +--------+------+ | asif | 20 | | mithun | 20 | | vinod | 21 | +--------+------+ 我要如下的订单 age count 20 2 21 1 你能试试吗 SELECT age,count(age) as count from test GROUP BY age 应按年龄从试验组中

从测试中选择*

+--------+------+  
| name   | age  |  
+--------+------+  
| asif   |   20 |  
| mithun |   20 |  
| vinod  |   21 |  
+--------+------+

我要如下的订单

age count
20   2
21   1

你能试试吗

SELECT age,count(age) as count from test GROUP BY age

应按年龄从试验组中选择年龄、countage作为计数；是的，我忘了加。但我编辑了：谢谢@punithasubramaniv