Database 如何在oracle中查找范围
我正试图找出以下问题的范围 我有一个名为my_tbleid varchar100、roll_no varchar100的表,其中包含以下值Database 如何在oracle中查找范围,database,oracle11g,range,Database,Oracle11g,Range,我正试图找出以下问题的范围 我有一个名为my_tbleid varchar100、roll_no varchar100的表,其中包含以下值 ------------------- |id | roll_no | ------------------- | 001 | 1 | | 002 | 2 | | 003 | 3 | | 004 | 4 | | 005 | 7 | | 006 | 8 |
-------------------
|id | roll_no |
-------------------
| 001 | 1 |
| 002 | 2 |
| 003 | 3 |
| 004 | 4 |
| 005 | 7 |
| 006 | 8 |
| 007 | 11 |
| 008 | 15 |
| 009 | 16 |
| 010 | 17 |
-------------------
输出应如下所示:
-----------
|roll_no |
---------
| 1-4 |
| 7-8 |
| 11-11 |
| 15-17 |
-----------
您还可以发现MySQL和Oracle是不同的RDBMS!这个结构显示这是来自mysql的
with base as (select 001 id, 1 roll_no from dual
union all
select 002 id, 2 roll_no from dual
union all
select 003 id, 3 roll_no from dual
union all
select 004 id, 4 roll_no from dual
union all
select 005 id, 7 roll_no from dual
union all
select 006 id, 8 roll_no from dual
union all
select 007 id, 11 roll_no from dual
union all
select 008 id, 15 roll_no from dual
union all
select 009 id, 16 roll_no from dual
union all
select 010 id, 17 roll_no from dual)
select min(roll_no)||' - '|| max(roll_no) roll_no
from (select roll_no
,connect_by_root roll_no root
from base
connect by prior roll_no = roll_no-1
start with roll_no not in (select roll_no
from base b
where exists (select 1
from base b1
where b1.roll_no = b.roll_no-1)))
group by root
order by root