A clever method to learn the continuous number segment of T-SQL query

There is a very ingenious SQL technique on the itpub to learn and record here.

The initial problem is this:

I have a table structure,

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

(The second field may be contiguous data, and a breakpoint may exist.) )

How to query out such a result, query a continuous record.

Like the following?

2014,00000001,00000005
2014,00000009,00000007
2013,00000120,00000122
2013,00000124,00000125

The friend on the itpub gave a very ingenious answer:

SQL> SELECT b.fphm, MIN (b.kshm) Start_HM, MAX (b.kshm) End_HM
2 FROM (SELECT a.*, TO_NUMBER (a.kshm - ROWNUM) cc
3 FROM (SELECT *
4 FROM t
5 ORDER BY fphm, kshm) a) b
6 GROUP BY b.fphm, b.cc
7 /
FPHM START_HM END_HM
---------- -------- --------
2013 00000120 00000122
2013 00000124 00000125
2014 00000001 00000005
2014 00000007 00000009

The ingenious thought, just in the one.