Use JOE to create an SQL*Plus job like this:
- Open JOE's Job Wizard
- Select SOSSQLPlusJob in the list of available jobs and enter a job name
- Goto "next" to set the parameters for the database connection etc.
See the reference documentation for the SQL*Plus job to get more information about the job parameters.
After you have finished the wizard you can insert the SQL*Plus script in the script tab of the job.
Alternatively you can put the SQL*Plus script in an external file and add this filename to the sql_script_file parameter.