簡單的sql查詢不同/數

Question

select * from test;

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

我想O/P如下

age count 
20 2 
21 1 

Answer 1

你能試試嗎？

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