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

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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