sqloader 数据导出怎么写

在数据库中有79张表 将其全部导出为txt格式的文本 该如何实现
导入语句如下：#!/bin/sh

 start_time=date +"%Y-%m-%d %H:%M:%S"
 start=date +%s
#set -x
 user=fina
 password=fina
 base_dir=/home/oracle/eastloader
 ctl_dir=${base_dir}/ctl_dir
 log_dir=${base_dir}/log

###########################################################
 ##get data_date,default the last day of last month##
 if [ $# -ne 1 ];then
 data_date=date +%Y%m%d
 yy=echo ${data_date}|cut -c 1-4
 mm=echo ${data_date}|cut -c 5-6
 dd=echo ${data_date}|cut -c 7-8
 if [ ${mm} -ne 1 ];then
 mm=expr ${mm} - 1
 aa=cal ${mm} ${yy}
 dd=echo ${aa}|awk '{print $NF}'
 if [ ${mm} -lt 10 ];then
 data_date=${yy}0${mm}${dd}
 else
 data_date=${yy}${mm}${dd}
 fi
 else
 yy=expr ${yy} - 1
 mm=12
 bb=31
 data_date=${yy}${mm}${bb}
 fi
 else
 data_date=${1}
 fi

##create ctl files##

if [ -d ${base_dir}/ctl_dir/${data_date} ];then
 rm -rf ${base_dir}/ctl_dir/${data_date}
 fi
 ##create ctl files##

if [ -d ${base_dir}/ctl_dir/${data_date} ];then
 rm -rf ${base_dir}/ctl_dir/${data_date}
 fi

if [ ! -d ${base_dir}/ctl_dir/${data_date} ];then
 mkdir -p ${base_dir}/ctl_dir/${data_date}
 fi

#cp ${base_dir}/ctl_dir/${data_date}/* ${base_dir}/ctl_dir/stand/
 cd ${base_dir}/ctl_dir/${data_date}
 #chmod 755 *

cat ${base_dir}/config.ini | while read line
 do
 touch B1068H215030001-${line}-${data_date}.ctl
 chmod 755 ${base_dir}/ctl_dir/${data_date}/B1068H215030001-${line}-${data_date}.ctl
 echo "load data CHARACTERSET ZHS16GBK">>${base_dir}/ctl_dir/${data_date}/B1068H215030001-${line}-${data_date}.ctl
 echo "infile '${base_dir}/data_dir/${data_date}/B1068H215030001-${line}-${data_date}.txt'">>${base_dir}/ctl_dir/${data_date}/B1068H215030001-${line}-${data_date}.ctl
 cat ${base_dir}/ctl_dir/stand/${line}.ctl >>${base_dir}/ctl_dir/${data_date}/B1068H215030001-${line}-${data_date}.ctl
 done

###########################################################
 ##main sqlloader##
 if [ -d ${base_dir}/log/${data_date} ];then
 rm -rf ${base_dir}/log/${data_date}
 fi

if [ ! -d ${base_dir}/log/${data_date} ];then
 mkdir -p ${base_dir}/log/${data_date}
 fi

if [ -f ${base_dir}/${data_date}_load_main.log ];then
 rm -rf ${base_dir}/${data_date}_load_main.log
 fi

cd ${base_dir}

cat ${base_dir}/config.ini | while read line
 do
 echo "${base_dir}/data_dir/${data_date}/B1068H215030001-${line}-${data_date}.txt"
 if [ -f ${base_dir}/data_dir/${data_date}/B1068H215030001-${line}-${data_date}.txt ];then
 sqlldr userid=${user}/${password} direct=true control=${base_dir}/ctl_dir/${data_date}/B1068H215030001-${line}-${data_date}.ctl log=${base_dir}/log/${data_date}/B1068H215030001-${line}-${data_date}.log rows=100000 readsize=25800000 bindsize=25800000

echo "<<<<<<<<<<<<<<<<<<<<date +%Y%m%d-%H:%M:%S start to load ${line}">>${data_date}_load_main.log
 cat ${base_dir}/log/${data_date}/B1068H215030001-${line}-${data_date}.log|grep "Total logical records skipped">>${data_date}_load_main.log
 cat ${base_dir}/log/${data_date}/B1068H215030001-${line}-${data_date}.log|grep "Total logical records read">>${data_date}_load_main.log
 cat ${base_dir}/log/${data_date}/B1068H215030001-${line}-${data_date}.log|grep "Total logical records rejected">>${data_date}_load_main.log
 cat ${base_dir}/log/${data_date}/B1068H215030001-${line}-${data_date}.log|grep "Total logical records discarded">>${data_date}_load_main.log
 else
 echo ">>>>>>>>>>>>>>>THE DATA FILE IS NOT READY!! ${line}">>${data_date}_load_main.log
 fi
 done

end_time=date +"%Y-%m-%d %H:%M:%S"
 end=date +%s
 echo "中间表数据结转成功,时间总计:"expr $end - $start

导出语句我该如何去写