SV: Useful Oracle books - C.J. Date theory vs. practicality
- From: Michael Garfield Sørensen <mgs@xxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 28 May 2004 23:48:59 +0200
And since Lex hasn?t done so yet (or did I miss a posting?)! ? I?ll say it
for him:
If you would really like to understand the issues with SQL and NULLs
- you should attend Lex?s ?SQL: Writing It Right!? course. I did and I
understand all of Lex?s arguments (well, almost (was there a NULL
in there somewhere) anyway). HIGHLY RECOMMENDED!
Greetings,
Michael
_____
Fra: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] På
vegne af Jared.Still@xxxxxxxxxxx
Sendt: 28. maj 2004 23:22
Til: oracle-l@xxxxxxxxxxxxx
Emne: RE: Useful Oracle books - C.J. Date theory vs. practicality
Thanks Lex, I lost track of the fact when looking at the exampl that the
discussion was about nulls.
And hence the value of real working examples rather than abstract templates.
:)
oracle-l-bounce@xxxxxxxxxxxxx wrote on 05/28/2004 12:56:08 PM:
> Jared, I stored your example in a script, making it prompt for a
condition:
>
> SQL*Plus: Release 10.1.0.2.0 - Production on Fri May 28 21:51:24 2004
> Copyright (c) 1982, 2004, Oracle. All rights reserved.
>
> SQL> @jared
> Enter value for condition: 'Mort subite' = NULL
> ELSE branch
> ELSE branch
>
> PL/SQL procedure successfully completed.
>
> SQL> @jared
> Enter value for condition: 1=1
> THEN branch
> ELSE branch
>
> PL/SQL procedure successfully completed.
>
> SQL> list
> 1 begin
> 2 if (&&condition) then
> 3 dbms_output.put_line('THEN branch');
> 4 else
> 5 dbms_output.put_line('ELSE branch');
> 6 end if;
> 7 if not (&condition) then
> 8 dbms_output.put_line('THEN branch');
> 9 else
> 10 dbms_output.put_line('ELSE branch');
> 11 end if;
> 12* end;
> SQL>
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