我有一个表结构，
fphm,kshm
2014,00000001
2014,00000002
2014,00000003
2014,00000004
2014,00000005
2014,00000007
2014,00000008
2014,00000009
2013,00000120
2013,00000121
2013,00000122
2013,00000124
2013,00000125

(第二个字段内可能是连续的数据，可能存在断点。)

怎样能查询出来这样的结果,查询出连续的记录来。
就像下面的这样？
2014,00000001,00000005
2014,00000009,00000007
2013,00000120,00000122
2013,00000124,00000125

方法一: 引用自hmxxyy.

SQL> select * from gap;

ID SEQ---------- ----------1 11 41 51 82 12 22 9

select res1.id, res2.seq str, res1.seq endfrom (  select rownum rn, c.* from (        select *      from gap a        where not exists (            select null from gap b where b.id = a.id and a.seq = b.seq - 1      )     order by id, seq  ) c) res1, (    select rownum rn, d.* from (        select *      from gap a        where not exists (            select null from gap b where b.id = a.id and a.seq = b.seq + 1     )     order by id, seq  ) d) res2where res1.id = res2.idand res1.rn = res2.rn/

ID STR END--------- ---------- ----------1 1 11 4 51 8 82 1 22 9 9

方法二: 使用lag/lead分析函数进行处理.. 楼上的方法确实挺好用就是觉得表扫描/表连接比较多, 可能数据量大了. 速度会比较慢, 当然我的这种方法由于使用分析函数使用的比较频繁.所以排序量可能比上一种要多..

SQL> select fphm,lpad(kshm,8,'0') kshm  2  from t  3  /

      FPHM KSHM                                                                 ---------- ----------------                                                           2014 00000001                                                                   2014 00000002                                                                   2014 00000003                                                                   2014 00000004                                                                   2014 00000005                                                                   2014 00000007                                                                   2014 00000008                                                                   2014 00000009                                                                   2013 00000120                                                                   2013 00000121                                                                   2013 00000122                                                             

      FPHM KSHM                                                                 ---------- ----------------                                                           2013 00000124                                                                   2013 00000125                                                             

13 rows selected.

SQL> set echo onSQL> @bbb.sqlSQL> select fphm,lpad(kshm,8,'0') start_kshm,lpad(prev_prev_kshm,8,'0') end_kshm  2  from (  3    select fphm,kshm,next_kshm,prev_kshm,  4      lag(kshm,1,null) over (partition by fphm order by kshm )next_next_kshm,  5    lead(kshm,1,null) over (partition by fphm order by kshm ) prev_prev_kshm  6    from (  7    select *  8       from (  9       select fphm,kshm, 10        lead(kshm,1,null) over (partition by fphm order by kshm) next_kshm, 11        lag(kshm,1,null) over (partition by fphm order by kshm) prev_kshm 12        from t 13       ) 14      where ( next_kshm - kshm <> 1 or kshm - prev_kshm <> 1 ) 15       or ( next_kshm is null or prev_kshm is null ) 16    ) 17  ) 18  where next_kshm - kshm = 1 19  /

      FPHM START_KSHM       END_KSHM                                            ---------- ---------------- ----------------                                          2013 00000120         00000122                                                  2013 00000124         00000125                                                  2014 00000001         00000005                                                  2014 00000007         00000009                                            

SQL> spool off

方法三: 今天早上wildflower给了我这个答案, 顿时觉得耳目一新啊..就贴出来与大家一起共享了^_^.

SQL> spool aaa.log
SQL> set echo on
SQL> select * from t;no rows selectedSQL> select * from t;FPHM       KSHM
---------- ----------2014          12014          22014          32014          42014          52014          72014          82014          92013        1202013        1212013        122FPHM       KSHM
---------- ----------2013        1242013        12513 rows selected.SQL> @bbb.sql
SQL> select b.fphm,min(b.kshm),max(b.kshm)2  from (3          select a.*,to_number(a.kshm-rownum) cc4          from (5                  select * from t order by fphm,kshm6          ) a7  )  b8  group by b.fphm,b.cc9  /FPHM MIN(B.KSHM) MAX(B.KSHM)
---------- ----------- -----------2013         120         1222013         124         1252014           1           52014           7           9

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