Person_table:
Id | |
---|---|
1 | [email protected] |
2 | [email protected] |
3 | [email protected] |
Q:
- 统计相同邮箱的个数
A:
select Email, count(Email) as num
from Person
group by Email;
Id | |
---|---|
1 | [email protected] |
2 | [email protected] |
3 | [email protected] |
select Email, count(Email) as num
from Person
group by Email;