Question

Ok this is a similar problem like the one I had before but it has the requirment that it needs to be a view with 1 variable and it needs to be as simple as possible.
I need a view that generates a list of dates within a given month (that is the variable).

Here is what I have so far:

create view monthview(datesetter) as (   
select
to_date(to_date(datesetter),'MM.YYYY')-1 + level as DateRange
from
dual
where
(to_date(to_date(datesetter),'MM.YYYY')-1+level) <= sysdate
connect by level<=31);

and the view should than be called by something like:

select * from monthview where datesetter='02.2008';

and then generate a list like

01.02.2007
02.02.2007

and so on

It either tells me that I can’t compile the view due to the fact that there is a mistake when I use datesetter or it compiles the view but then it tells me thata there is a non numeric value where a numeric one is needed when I use ‘datesetter’ ….

Thanks for any ideas or help

Answer 1

try a pipelined function:

create or replace type date_array_type as table of date;

create or replace function monthview (datesetter varchar2) return date_array_type
pipelined as

cursor c is 
select to_date(level || '.' || datesetter , 'dd.mm.yyyy') dt
from dual
connect by level <= to_number(to_char(
  last_day(to_date(datesetter , 'mm.yyyy')), 'dd'));

begin

for r in c loop

  pipe row(r.dt);

end loop;

return;

end;

Now you can use it like this:

select * from table( monthview('03.2012'));

Here is a fiddle