Help in building alogic

Question

i need a lill help in building alogic
suppose there is a table which has the fields and data as follows
date flag
01-SEP-2008 y
02-SEP-2008     
03-SEP-2008
04-SEP-2008 y
05-SEP-2008
06-SEP-2008
07-SEP-2008
08-SEP-2008 y
now i have to start selecting the records starting from bottom of the table i.e, from DATE:08-SEP-2008 FLAG:y
till it finds the next flag set to YES i.e 04-SEP-2008.
Thats means i have to select total of 5 records from bottom.
Can you please help with the logic

Answer 1

Hi,
how about this?
SQL> with t as ( -- "sample data"
  2  select '01-SEP-2008' date_, 'y' flag from dual union
  3  select '02-SEP-2008', null from dual union
  4  select '03-SEP-2008', null from dual union
  5  select '04-SEP-2008', 'y' from dual union
  6  select '05-SEP-2008', null from dual union
  7  select '06-SEP-2008', null from dual union
  8  select '07-SEP-2008', null from dual union
  9  select '08-SEP-2008', 'y'  from dual
10  ) --"end sample data"
11  select *
12    from (select * from t where flag is not null order by date_ desc)
13   where rownum <= 2;
DATE_       FLAG
08-SEP-2008 y
04-SEP-2008 y