33 - 连续出现的数字

-- 开窗函数lead(col,n) 统计窗口内往下第n行值
-- over(partition by xxx) 按照xxx所有行进行分组
-- over(partition by xxx order by aaa) 按照xxx分组，按照aaa排序

select distinct num as ConsecutiveNums 
from(
    select 
        num,
        # 从当前记录获取前一行记录的num值，如果没有前一行，则返回null
        lead(num,1) over(order by id) as a,
        # 从当前记录获取后一行记录的num值，如果没有后一行，则返回null
        lead(num,2) over(order by id) as b
    from
        logs
) t
where
    num=a and num=b;