2013.10.01 00:00
ROW_NUMBER(), RANK(), and DENSE_RANK()
SELECT seq,c1
,ROW_NUMBER() OVER (ORDER BY fa.fa_groupcode) AS rn
,RANK() OVER (ORDER BY fa.fa_groupcode) AS rank
,DENSE_RANK() OVER (ORDER BY fa.fa_groupcode) AS dr
FROM TABLE
| seq | c1 | rn | rank | dr |
| 1 | a | 1 | 1 | 1 |
| 2 | b | 2 | 3 | 2 |
| 3 | b | 3 | 3 | 2 |
| 4 | c | 4 | 4 | 3 |
| 5 | c | 5 | 4 | 3 |
| 6 | c | 6 | 4 | 3 |
| 7 | d | 7 | 7 | 4 |
| 8 | d | 8 | 7 | 4 |
| 9 | d | 9 | 7 | 4 |
| 10 | d | 10 | 7 | 4 |