从两个数字之间的mysql数据库中获取缺失的数字

Question

I'd like to get the missing numbers from a mysql database between two numbers. The range is from 0000000001 to 9999999999. In my table I have two columns serial_start and serial_end . In the first row, values are 100 and 500 and in the second row, 501 and 9999999999. I want to get the missing values from 1 to 99.

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Answer 1

You can use lead() to get the missing values in-between rows and union all to bring in the first one:

select serial_start + 1, next_ss - 1
from (select t.*,
             lead(serial_start) over (partition by year order by serial_start) as next_ss
      from t
      where year = 2020
     ) t
where next_ss is not null or next_ss <> ss + 1
union all
select 1, min(serial_start) - 1
from t
where year = 2020
group by year
having min(serial_start) <> 1;