SQL을 사용하여 일련의 누락 요소를 찾는 방법은 무엇입니까?

Question

테이블 bill의 열 이름이 인 bill_id입니다. bill_id 값 범위는 1 내지 40이고, I는 I 누락 요소를 찾는 방법

bill_id 
----------- 
1 
3 
6 
8 
2 
21 
34 
35 
26 
40 

같은 행이 (4, 5, 7, 9, 10, 등)?

Answer 1

SQL> create table bill (bill_id) 
    2 as 
    3 select 1 from dual union all 
    4 select 3 from dual union all 
    5 select 6 from dual union all 
    6 select 8 from dual union all 
    7 select 2 from dual union all 
    8 select 21 from dual union all 
    9 select 34 from dual union all 
10 select 35 from dual union all 
11 select 26 from dual union all 
12 select 40 from dual 
13/

Table created. 

SQL> with all_possible_bill_ids as 
    2 (select level bill_id 
    3  from dual 
    4 connect by level <= 40 
    5 ) 
    6 select bill_id 
    7 from all_possible_bill_ids 
    8 minus 
    9 select bill_id 
10 from bill 
11/

    BILL_ID 
---------- 
     4 
     5 
     7 
     9 
     10 
     11 
     12 
     13 
     14 
     15 
     16 
     17 
     18 
     19 
     20 
     22 
     23 
     24 
     25 
     27 
     28 
     29 
     30 
     31 
     32 
     33 
     36 
     37 
     38 
     39 

30 rows selected. 

감사합니다,
롭.