RE: what to put in place of null

On second thought, to_char and to_number as well, I just prefer '' for chars. So, never mind.

(And I just told Lisa that I was NOT an idiot, not today at least. That was then, this is now.)

> -----Original Message-----
> From: Yosi
> Sent: Tuesday, June 05, 2001 7:18 PM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: what to put in place of null
>
>
> Don't think so. Use:
>
> ...
> union
> select '', '', dd2, dd3
> /
>
> The empty string is equivalent to null for inserts and updates.
>
> hth,
>
> Yosi
>
>
> > -----Original Message-----
> > From: lhoska_at_calibresys.com [mailto:lhoska_at_calibresys.com]
> > Sent: Tuesday, June 05, 2001 6:14 PM
> > To: Multiple recipients of list ORACLE-L
> > Subject: RE: what to put in place of null
> >
> >
> > Try applying data conversion function to_char/to_date or nvl
> > function if dd
> > and dd1 are numbers to the nulls in the second select.
> > Example:
> >
> > cursor c1 is
> > select dd,dd1,dd2,dd3 from dd
> > union
> > select to_char(null),to_char(null),dd2,dd3
> > from dd1;
> >
> > The point here is you need to have as many columns in your
> > second select
> > statement as your first select has and the datatypes have
> to match.
> >
> > -----Original Message-----
> > Sent: Tuesday, June 05, 2001 5:31 PM
> > To: Multiple recipients of list ORACLE-L
> >
> >
> > Hi,
> >
> > I have a cursor declared as
> > cursor c1 is
> > select dd,dd1,dd2,dd3 from dd
> > union
> > select null,null,dd2,dd3 from dd1;
> >
> > i am getting error:
> > *
> > ERROR at line 1:
> > ORA-01790: expression must have same datatype as
> > corresponding expression
> > ORA-06512: at "DY.REST", line 4
> > ORA-06512: at "DY.REST", line 10
> > ORA-06512: at line 1
> >
> > what to replace null with......
> > dd1 has only 2 columns dd2 and dd3.....
> >
> > Thanks
> > Harvinder
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author: Harvinder Singh
> > INET: Harvinder.Singh_at_MetraTech.com
> >
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> > INET: lhoska_at_calibresys.com
> >
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author:
> INET: Yosi_at_comhill.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: 
  INET: Yosi_at_comhill.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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