[sql-04] 连续出现至少三次的数字

数据准备

CREATE TABLE `leecode_01` (
  `id` bigint not null  AUTO_INCREMENT,
  `num` int DEFAULT NULL COMMENT '用户名',
  primary key(`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT 'leecode(连续出现3次的数字)'



insert into leecode_01(num) values(12);
insert into leecode_01(num) values(12);
insert into leecode_01(num) values(12);
insert into leecode_01(num) values(13);
insert into leecode_01(num) values(13);
insert into leecode_01(num) values(14);
insert into leecode_01(num) values(14);
insert into leecode_01(num) values(14);

sql

select 
    distinct(num) num
from(
select 
    (id+rn) flag,
    num
from (
        select 
            id,
            num,
            row_number() over(partition by num order by id desc) rn 
        from leecode_01 l2 
    ) a
) b  group by num,flag having count(*)>=3

运行结果