SV: Useful Oracle books - C.J. Date theory vs. practicality

From: Michael Garfield Sørensen <mgs_at_CeDeT.dk>
Date: Fri, 28 May 2004 23:48:59 +0200
Message-Id: <20040528214619.EC44D5EE03A@pfepb.post.tele.dk>

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_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] På vegne af Jared.Still_at_radisys.com
Sendt: 28. maj 2004 23:22
Til: oracle-l_at_freelists.org
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_at_freelists.org 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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Received on Fri May 28 2004 - 16:43:11 CDT