【SQL】查询部门有2个人或以上员工的部门号
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2022-03-05 11:21:11
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查询部门有2个人或以上员工的部门号
id payno
1 lisi
1 zhangsan
2 wangmeng
3 zhaoliu
3 wuxia
3 mengfang
4 guodaxia
5 guofurong
结果如下:
id
1
3
解决:
方法一:
SELECT DISTINCT id
FROM(
SELECT id
,payno
,row_number () over (PARTITION BY id ORDER BY payno) AS rn
FROM gorder
) a
WHERE rn = 2
;
方法二:
select id
from (
select id
,count(payno) as c
from gorder
group by id
)a
where c >= 2
;
备注:建表和数据
create table gorder(id int,payno varchar(10));
insert into gorder values(1,'lisi');
insert into gorder values(1,'zhangsan');
insert into gorder values(2,'wangmeng');
insert into gorder values(3,'zhaoliu');
insert into gorder values(3,'wuxia');
insert into gorder values(3,'mengfang');
insert into gorder values(4,'guodaxia');
insert into gorder values(5,'guofurong');
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