Connect by level , help

Question

Could someone help with connect by level. Iam trying to get week ending date for all the projects in the table.
select pid , enddate + 7*level as end_date , level
from
(select enddate(somedate logic from diff tables), t1.pid
from
table1 t1 , table2 t2
where
cobditions...
t1.id = t2.id and t1.pid = '123'
) connect by level <= 4
This logic works for a single project..
If same thing i do for multiple projects, it doesnt seem to work.
for Single Project result is like is
ProjectId Date
123     17-AUG-08
123     24-AUG-08
123     31-AUG-08
123     07-SEP-08
Samething for multiple projects, it results like this
(I use the same qry but don’t send the id there)
ProjectId Date level
123     17-AUG-08 1
123     24-AUG-08 2
123     31-AUG-08 3
123     07-SEP-08 4
125     07-sep-08 4
126 09-sep-08 4
COuld someone help me to how to achieve this for multiple projects.

Answer 1

I am not sure what are you trying to do, but week ending date for a given date can be calculated using NEXT_DAY or TRUNC functions. Issue is "week ending" itself. It is nls dependent. If you want to get client nls specific "week ending" date use:
next_date(given_date-1,7)
SQL> select next_day(sysdate-1,7) week_ending_date,
  2         to_char(next_day(sysdate-1,7),'Day') week_ending_day
  3    from dual
  4  /
WEEK_ENDI WEEK_ENDI
20-SEP-08 Saturday
SQL> alter session set nls_territory=france;
Session altered.
SQL> select next_day(sysdate-1,7) week_ending_date,
  2         to_char(next_day(sysdate-1,7),'Day') week_ending_day
  3    from dual
  4  /
WEEK_END WEEK_ENDI
21/09/08 Sunday
SQL> As you can see, next_date(given_date-1,7) will return nearest Saturday for client in the US and Sunday for a client in France. If you want nls independent solution you could use function TRUNC with IW format. ISO week always starts Monday. So if you consider Saturday as week ending day use:
TRUNC(given_date,'IW') + 6
SQL> alter session set nls_territory=america;
Session altered.
SQL> select trunc(sysdate,'IW') + 5 week_ending_date,
  2         to_char(trunc(sysdate,'IW') + 5,'Day') week_ending_day
  3    from dual
  4  /
WEEK_ENDI WEEK_ENDI
20-SEP-08 Saturday
SQL> alter session set nls_territory=france;
Session altered.
SQL> select trunc(sysdate,'IW') + 5 week_ending_date,
  2         to_char(trunc(sysdate,'IW') + 5,'Day') week_ending_day
  3    from dual
  4  /
WEEK_END WEEK_ENDI
20/09/08 Saturday
SQL> if you consider Sunday as week ending day use:
SQL> alter session set nls_territory=america;
Session altered.
SQL> select trunc(sysdate,'IW') + 6 week_ending_date,
  2         to_char(trunc(sysdate,'IW') + 6,'Day') week_ending_day
  3    from dual
  4  /
WEEK_ENDI WEEK_ENDI
21-SEP-08 Sunday
SQL> alter session set nls_territory=france;
Session altered.
SQL> select trunc(sysdate,'IW') + 6 week_ending_date,
  2         to_char(trunc(sysdate,'IW') + 6,'Day') week_ending_day
  3    from dual
  4  /
WEEK_END WEEK_ENDI
21/09/08 Sunday
SQL> As you can see TRUNC(given_date,'IW') + N is nls independent.
SY.