Count(*)与Count(*)cnt的区别

mysql> select Count(*) from employees
    -> ;
+----------+
| Count(*) |
+----------+
|   300024 |
+----------+
1 row in set (0.24 sec)

mysql> select Count(*)cnt from employees
    -> ;
+--------+
| cnt    |
+--------+
| 300024 |
+--------+
1 row in set (0.05 sec)
 

可以说这个Count(*)cnt的写法真的是很糟糕,省略了"As".