RE: what to put in place of null

From: <lhoska_at_calibresys.com>
Date: Tue, 05 Jun 2001 14:18:50 -0700
Message-ID: <F001.0031CFE6.20010605141354@fatcity.com>

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
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Author: Harvinder Singh
INET: Harvinder.Singh_at_MetraTech.com

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Author:
INET: lhoska_at_calibresys.com

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