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Checking columns in SQL, comparing user input and sizes.

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Old 11-01-2010
Checking columns in SQL, comparing user input and sizes.
I'm writing a KSH shell script that's using SQL though DB2.

If I have a table defined and populated
Code:
db2 "create table tb(num int,letter char(4))"
db2 "insert into tb values(111,a)
db2 "insert into tb values(112,b)
db2 "insert into tb values(111,c)

How can I check if a letter user input in my shell script matches a particular number?
So
Code:
echo "enter ltr"
read ltr
db2 "select letter from tb where number = 111"
if [ltr =  ...   '* how do i check if the letter the user input is one of those that matches for 111?

Also, how can I figure out the biggest number value in the table and insert it into a variable in the shell script?
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LEARN ABOUT SUSE

ocf_heartbeat_db2

OCF_HEARTBEAT_DB2(7)						OCF resource agents					      OCF_HEARTBEAT_DB2(7)

NAME

       ocf_heartbeat_db2 - Manages an IBM DB2 Universal Database instance

SYNOPSIS

       db2 [start | stop | status | monitor | validate-all | meta-data | methods]

DESCRIPTION

       Resource script for db2. It manages a DB2 Universal Database instance as an HA resource.

SUPPORTED PARAMETERS

       instance
	   The instance of database. (required, string, no default)

       admin
	   The admin user of the instance. (optional, string, no default)

SUPPORTED ACTIONS

       This resource agent supports the following actions (operations):

       start
	   Starts the resource. Suggested minimum timeout: 120.

       stop
	   Stops the resource. Suggested minimum timeout: 120.

       status
	   Performs a status check. Suggested minimum timeout: 60.

       monitor
	   Performs a detailed status check. Suggested minimum timeout: 60. Suggested interval: 10.

       validate-all
	   Performs a validation of the resource configuration. Suggested minimum timeout: 5.

       meta-data
	   Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5.

       methods
	   Suggested minimum timeout: 5.

EXAMPLE

       The following is an example configuration for a db2 resource using the crm(8) shell:

	   primitive example_db2 ocf:heartbeat:db2 
	     params 
	       instance=string 
	     op monitor depth="0" timeout="60" interval="10"

SEE ALSO

       http://www.linux-ha.org/wiki/db2_(resource_agent)

AUTHOR

       Linux-HA contributors (see the resource agent source for information about individual authors)

resource-agents 1.0.3						    07/05/2010						      OCF_HEARTBEAT_DB2(7)