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id    colDate
1    2009-12-15
2    2009-12-16
3    2009-12-17
4    2009-12-18
........
30    2010-01-14
31    2010-01-15
select rownum,add_months(sysdate, -1) + rownum - 1
from dual
where rownum <= sysdate - add_months(sysdate, -1);

where¸Ä³Éconnect by
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SQL code:
SQL> select trunc(add_months(sysdate, -1)+rownum-1)
2 from all_tables
3 where add_months(sysdate, -1)+rownum-1<=sysdate;

TRUNC(ADD
---------
15-DEC-09
16-DEC-09
17-DEC-09
18-DEC-09
19-DEC-09
20-DEC-09
21-DEC-09
22-DEC-09
23-DEC-09
24-DEC-09
25-DEC-09

TRUNC(ADD
---------
26-DEC-09
27-DEC-09
28-DEC-09
29-DEC-09
30-DEC-09
31-DEC-09
01-JAN-10
02-JAN-10
03-JAN-10
04-JAN-10
05-JAN-10

TRUNC(ADD
---------
06-JAN-10
07-JAN-10
08-JAN-10
09-JAN-10
10-JAN-10
11-JAN-10
12-JAN-10
13-JAN-10
14-JAN-10
15-JAN-10

32 rows selected.

SQL>



SQL code:
select to_char(minutes,'yyyy-mm-dd hh24:mi') from
(
select to_date('2009-10-12 12:12:12','yyyy-mm-dd hh24:mi:ss') + (rownum-1)/24/6


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