PostgreSQL找到重复的字段

Question

我的表格如下：

ID PERSON UPDATE
1   132  1.1.2015
1   132  2.1.2015
3   152  4.5.2013
9   152  1.2.2013

我需要计算具有不同身份且大于1的人。

Answer 1

我想你想要这个：

select person, count(distinct id)
from t
group by person
having count(distinct id) > 1;

Answer 2

select person, count(*) from table
where id>1
group by person

或

select person, count(*) from table
where id<>1
group by person