选择只有一个序列

Question

我想在我的表中选择后只是其中的一部分，我读00006和停止时，我读下一模式00XXX选择。（这里是00040，但它可能是另一个号码）

00006 
123456 
456789 
123789 
00040 
125478 
547896 
454623 
519846 
00001 
.... 

这里，例如我想用一个选择只得到这些值：

怎样的方式来获得？我没有找到任何线索。

感谢您的帮助。

PS：我有变换，其中i选择

与查尔斯的解表没有任何权限：

with marker as (
    select rownumber() over() as rowno 
      , rrn(t) as recno, cast(substr(YYYYYY, 1, 5)as integer) as markvalue 
    from fap1t010.£$ZZZZZZ t 
    where substr(YYYYYY, 1, 5) like ('00___') 
), dataa as (
    select rrn(t) as recno, cast(substr(YYYYYY, 1, 6)as integer) as datavalue 
    from fap1t010.£$ZZZZZZ t 
    where substr(YYYYYY, 1, 5) NOT like ('00006') 
    and substr(YYYYYY, 13, 1) ='C' 
), ranges as(
    select a.markvalue 
     , a.recno as startrec 
     , b.recno as endrec 
    from marker A join marker B 
    on b.rowno = a.rowno +1 
) 
select distinct d.datavalue 
from ranges R join dataa D 
     on d.recno between r.startrec and r.endrec 
where r.markvalue = 00006 

Answer 1

哇...这是一个丑陋的请求。

但是这是可以做到：

with marker as (
    select rownumber() over() as rowno 
      , rrn(t) as recno, myfld as markvalue 
    from dtcwilt.temp t 
    where myfld like ('00___ ') 
), data as (
    select rrn(t) as recno, myfld as datavalue 
    from dtcwilt.temp t 
    where myfld NOT like ('00___ ') 
), ranges as(
    select a.markvalue 
     , a.recno as startrec 
     , b.recno as endrec 
    from marker A join marker B 
    on b.rowno = a.rowno +1 
) 
select d.datavalue 
from ranges R join data D 
     on d.recno between r.startrec and r.endrec 
where r.markvalue = '00006'; 

如果你有一个大的数据集，性能不会是所有伟大;有可能有改进的余地。但以上至少容易理解。

如果您恰好在IBM i的最新版本7.3上，则可以通过使用新的LEAD()和/或LAG()函数简化说明。但我没有7.3来测试。