Re: VAR : does anybody have a clue?

A copy of this was sent to kal121_at_yahoo.com (if that email address didn't require changing) On Fri, 12 Nov 1999 21:50:17 GMT, you wrote:

>This is what I am trying to do:
>
>SQL> var x number -- declare a variable named x
>
>Now, what I want to do is assign:
>select sum(bytes) from v$sgastat INTO x
>
>to be used as follows:
>
>SELECT name, bytes, bytes/x FROM v$sgastat;
>
>bytes/x would give me the percent of the sga devoted to that particular
>sga component in the third column.
>
>Does anybody know the CORRECT way to do this?
>

it would be:

tkyte_at_8.0> var x number
tkyte_at_8.0> exec select sum(bytes) into :x from v$sgastat

PL/SQL procedure successfully completed.

tkyte_at_8.0> select name, bytes, bytes/:x from v$sgastat   2 /

NAME                                BYTES   BYTES/:X
------------------------------ ---------- ----------
fixed_sga                           44924 .000400538
db_block_buffers                 81920000 .730391468
[snip]
fixed allocation callback             928 8.2740E-06
type object de                      22740 .000202748

37 rows selected.

Although it might be better to code:

tkyte_at_8.0> select name, bytes, bytes/sum_bytes   2 from v$sgastat, ( select sum(bytes) sum_bytes from v$sgastat )   3 /

NAME                                BYTES BYTES/SUM_BYTES
------------------------------ ---------- ---------------
fixed_sga                           44924      .000400538
db_block_buffers                 81920000      .730391468
[snip]
fixed allocation callback             928      8.2740E-06
type object de                      22740      .000202748

37 rows selected.

as that works in all environments (doesn't require sqlplus'isms)

>Thanks
>
>
>Sent via Deja.com http://www.deja.com/
>Before you buy.

--
See http://osi.oracle.com/~tkyte/ for my columns 'Digging-in to Oracle8i'... Current article is "Part I of V, Autonomous Transactions" updated June 21'st  

Thomas Kyte                   tkyte_at_us.oracle.com
Oracle Service Industries     Reston, VA   USA

Opinions are mine and do not necessarily reflect those of Oracle Corporation Received on Sat Nov 13 1999 - 09:08:46 CST