How to use bind vars in SQL*Plus Script?

I am trying to use a bind var in my script ... does not seem to work ... something along these lines.
variable v_id number;
select max(user_id) into :v_id
from user_id_tbl;
exec trace_user(:v_id);
This is in a UNIX Script - I don't get any errors but the binding is not working - not passing a valid v_id ... Any ideas?

For the record a solution is:
variable v_id number;
begin
select max(user_id) into :v_id from user_id_tbl;
end;
exec trace_user(:v_id);
-- CJ

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error: Bind Variable "ENDING_DATE" not declared
Report Date and Time:
26-OCT-2010 15:44:13
List of Unapproved Adjustments
Bind Variable 'ENDING_DATE" not declared
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define p_fy_begin_date = '&2'
define p_start_date = '&3'
define p_end_date = '&4'
define p_conversion = '&5'
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exec :begin_date := p_start_date;
variable ending_date date;
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set linesize 180
set heading on
set feedback off
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prompt
prompt Report Date and Time:
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Hi
Please go to customization part of the report and verify..You have set a default value out there ..And also verify your lov and look at the values ..If it is again giving you the problem ..pl delete the report and develop it again from the scratch it will be solved...
vishnu
null

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host rm tempfile.bufHowever of course Windows has no "rm" command by default, so I have to edit the script to use
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Thanks guys. This seems to work in Windows XP - will try on Unix when I get a chance:
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col LIST_COMMAND new_value LIST_COMMAND
def list_command = TYPE
def delete_command = DEL
SELECT DECODE(os,'MSWIN','TYPE','cat') AS list_command
     , DECODE(os,'MSWIN','DEL','rm')   AS delete_command
FROM   ( SELECT CASE WHEN UPPER(program) LIKE '%.EXE' THEN 'MSWIN' END AS os
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How to control logic flow in SQL Plus script

Hi
I have the requirement below:
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Let's say i am executing a script A.sql.
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block begins...
select user into var1 from dual
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Hi,
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If you really have to do it in SQL*Plus, here are two ideas:
(1) run a script conditionally
(2) deliberately raise an error
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PROMPT You are not authorized to do this.
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(2) Deliberately raise an error, either in a separate script or in a.sql itself, like this:
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Hi Experts,
How to use bind variables in this procedure for static queries.
PROCEDURE DELETE_MER_PROC (M_id IN NUMBER)
IS
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976208 wrote:
How to use v_date and m_id as bind variables in this procedure to avoid hard parsing.
You cannot avoid hard parsing - as the 1st time a SQL statement (like the SELECT or DELETE statements in your code) is encountered, it does not reside in the server's Shared Pool, and needs to be added into the pool via a hard parse.
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We connect from a VB 6.0 program via OO4O to an Oracle 8.1.7 database, using bind variables in connection with select statements. Running ok, but performance again by using bind vars not as good as expected!
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We connect from a VB 6.0 program via OO4O to an Oracle 8.1.7 database, using bind variables in connection with select statements. Running ok, but performance again by using bind vars not as good as expected!
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