Crontab tbl_load.sh script at whatever schedule you wanted.

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tbl_ldgrload.sh
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#!/bin/csh -f
#
echo "Starting ctlipt $0 on `date`."
setenv ORACLE_SID xyzz
setenv ORAENV_ASK NO
source /usr/bin/coraenv
#
echo sqlldr control=l_budl parfile=ldirp.par
sqlldr control='/data2/xyzz/ctl/l_budl' log='/data2/xyzz/log/l_budl.log' parfile
=ldirp.par
#
echo sqlldr control=l_clprj parfile=lconv.par
sqlldr control='/data2/xyzz/ctl/l_clprj' log='/data2/xyzz/log/l_clsprj.log' parfile=ldirp.par
#
echo sqlldr control=l_fdled parfile=ldirp.par
sqlldr control='/data2/xyzz/ctl/l_fdled' log='/data2/xyzz/log/l_fdled.log' parfile=ldirp.par
#
echo "Script $0 on `date` has finished."
#End of file.

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lcnvp.par
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userid = xyzz/*****
rows = 2000
discardmax = 10
errors = 100
direct = false
silent = (discards)

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ldirp.par
::::::::::::::
userid = xyzz/*****
rows = 2000
discardmax = 10
errors = 100
direct = true
silent = (discards)
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