Oracle SQL，範圍在1-1000之間

Question

我有一個包含數字的表，範圍在1-1000之間，它們是唯一的，但是我需要使用Oracle SQL從表中確定1-1000範圍內哪些數字缺失，

1,3,4,5,6,8,9,10

結果2,7

任何人都可以用一個腳本或URL到一個腳本幫助？

Answer 1

你可以使用：

select level from dual 
connect by level<=1000 
minus 
select mycolumn from mytable 

編輯：

要找出哪些號碼是從序列丟失，而不硬編碼1000：

select level from dual 
connect by level < (select max(mycolumn) from mytable) 
minus 
select mycolumn from mytable 

Answer 2

嘗試：

select a.check_number 
from (select level check_number from dual connect by level <= 1000) a 
where not exists 
(select null from myTable t where a.check_number = t.lookup_number) 

Answer 3

with numbers as (
    select level as i 
    from dual 
    connect by level <= (select max(some_number) from your_table) 
) 
select nr.i as missing 
from numbers nr 
    left join your_table yt on yt.some_number = nr.i 
where yt.some_number is null;