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Top Forums UNIX for Advanced & Expert Users Connecting once using sqlplus and doing multiple queries Post 302445279 by edlin_r on Sunday 15th of August 2010 03:55:58 AM
Old 08-15-2010
Data Connecting once using sqlplus and doing multiple queries

Hello everyone,

It's my first week using unix and shell scripting. I tried creating a script that has a function that execute SQL query. my script looks something like this:

----------------------------------------------------

Code:
#!/bin/sh
 
tableName="myTable"
secondTable="secondTable"
 
myFunction()
{
myQuery=`sqlplus -s usr/pass << EOF
set heading off
SELECT COUNT(*) FROM $tableName WHERE <condition>;
EOF`
if [ $myQuery = '0' ]; then
myQuery=`sqlplus -s usr/pass << EOF
set heading off
SELECT COUNT(*) FROM $secondTable WHERE <condition>;
EOF`
fi
return $myQuery
}
 
myFunction
output=`echo $?`

----------------------------------------------------

Correct me if I'm wrong, but I believe that if I always use the "sqlplus -s usr/pass" statement everytime I need a record query, It would slow down my processing.. I have to call this function about 5000 times (need to query 5000 times to check record).

how can I execute multiple queries (select) without being redundant on the ''sqlplus -s....'' statement?

Please help me. Thank you.

Last edited by pludi; 08-15-2010 at 08:54 AM.. Reason: code tags, please...
 

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INITSCRIPT(5)						Linux System Administrator's Manual					     INITSCRIPT(5)

NAME
initscript - script that executes inittab commands. SYNOPSIS
/bin/sh /etc/initscript id runlevels action process DESCRIPTION
When the shell script /etc/initscript is present, init will use it to execute the commands from inittab. This script can be used to set things like ulimit and umask default values for every process. EXAMPLES
This is a sample initscript, which might be installed on your system as /etc/initscript.sample. # # initscript Executed by init(8) for every program it # wants to spawn like this: # # /bin/sh /etc/initscript <id> <level> <action> <process> # # Set umask to safe level, and enable core dumps. umask 022 ulimit -c 2097151 PATH=/bin:/sbin:/usr/bin:/usr/sbin export PATH # Increase the hard file descriptor limit for all processes # to 8192. The soft limit is still 1024, but any unprivileged # process can increase its soft limit up to the hard limit # with "ulimit -Sn xxx" (needs a 2.2.13 or later Linux kernel). ulimit -Hn 8192 # Execute the program. eval exec "$4" NOTES
This script is not meant as startup script for daemons or somesuch. It has nothing to do with a rc.local style script. It's just a handler for things executed from /etc/inittab. Experimenting with this can make your system un(re)bootable. FILES
/etc/inittab, /etc/initscript. AUTHOR
Miquel van Smoorenburg ,<miquels@cistron.nl> SEE ALSO
init(8), inittab(5). July 10, 2003 INITSCRIPT(5)
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