Sql 我正在对付的帽子。这不是我能控制的桌子。是我公司购买的软件的一部分，因此我转换成了数字。感谢您的回复，我对此表示感谢。@Miguel-理解，但您可以控制结果集中列的名称（或者您不知道吗？），因此您可以选择不将其称为ACCT。更重要的是，这是您需要的，还是其

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我正在对付的帽子。这不是我能控制的桌子。是我公司购买的软件的一部分，因此我转换成了数字。感谢您的回复，我对此表示感谢。@Miguel-理解，但您可以控制结果集中列的名称（或者您不知道吗？），因此您可以选择不将其称为ACCT。更重要的是，这是您需要的，还是其他什么？我想输入中有两行，2003-2008和2033-2036。您需要从2003年到2008年以及从2033年到2036年的所有数字，还是从2003年到2036年的所有数字？我的解决方案是后者（所有数字）——这就是你需要的吗？

CREATE TABLE ACCT (ACCT_FROM VARCHAR2(6) , ACCT_TO VARCHAR2(6) ); 

INSERT INTO ACCT VALUES ('2015', '2018');  
INSERT INTO ACCT VALUES ('2019');  
INSERT INTO ACCT (ACCT_FROM) VALUES ('2019');  

"ACCT_FROM" "ACCT_TO"
"2015"  "2018"
"2019"  ""

ACCT
2015
2016
2017
2018
2019

select acct_from  from ACCT where   
acct_from between '2000' and '2999'  
and (ACCT_FROM like '2%' or ACCT_TO like '2%') ; 

SELECT Val 
FROM
(
    SELECT ACCT_FROM AS Val FROM ACCT WHERE ACCT_FROM like '2%' 
    UNION
    SELECT ACCT_TO AS Val FROM ACCT  WHERE ACCT_TO like '2%' 
) T
ORDER BY Val

with rangeOfAccounts(accounts, acct_to) as (
    select to_number(acct_from) as accounts,  to_number(ACCT_TO) as acct_to
    from acct where acct_from like '2%'
    union all
    select accounts + 1, ACCT_TO
    from rangeOfAccounts
    where accounts + 1 <= ACCT_TO
)
select accounts
from rangeOfAccounts
order by accounts

with nrs as ( select rownum  +1999 nr from ( select 1 from dual group by cube (1,2,3,4,5,6,7,8,9,10) ) where rownum <= 1000 )

with nrs as ( select rownum  +1999 nr from ( select 1 from dual group by cube (1,2,3,4,5,6,7,8,9,10) ) where rownum <= 1000 )
select nrs.nr 
from   acct 
,      nrs
where  acct_to is not null
and    nrs.nr between to_number( acct_from ) and to_number( acct_to )
union 
select to_number(acct_from )
from   acct 
where  acct_to is null 
and    to_number(acct_from) between 2000 and 2999

with
     acct ( acct_from, acct_to ) as (
       select '2015', '2018' from dual union all
       select '2019', null   from dual
     ),
     prep ( acct_2xxx ) as (
       select  to_number(acct_from)
         from  acct
         where acct_from like '2%'
       union all
       select  to_number(acct_to)
         from  acct
         where acct_to like '2%'
     ),
     acct_m ( acct_min, acct_max ) as (
       select min(acct_2xxx), max(acct_2xxx)
       from   prep
     )
select to_char(acct_min + level - 1) as acct_all
from   acct_m
connect by level <= acct_max - acct_min + 1
;

ACCT_ALL
----------------
2015
2016
2017
2018
2019

5 rows selected.