将Oracle数据库中某张表的内容导出成文本格式文件

#!/bin/ksh
#############################################################################
#功能：
# 将数据库中某张表的内容导出成为一个文本格式,每条记录一行
#配置：
# 参见当前目录下unload.ctl文件
#用法：
# sqlunldr userid/passwd[@connection]  table_name
#注意：
# 如果表中某域为char(n)，包含\n,\r等将会造成导出的数据行数比实际记录数多
#              
#############################################################################

getConfig()
{
  if [ -f "./unload.ctl" ];then
    . ./unload.ctl

 echo "Begin reading unload.ctl."
    echo =============================
    echo "sep=$sep"
    echo "fields=$fields"
    #`echo $fields|sed -e "s/ //g" `
    echo "destDir=$destDir"
    echo "where=$where "
    echo "order=$order "
   
    echo =============================
    echo "Reading unload.ctl complete."
    echo ""
    return 0
  else
    return 1
  fi
}

getConfig
if [ $? -ne 0 ];then
   echo "Error: Can not find unload.ctl file.Please check it!"
   exit 1
fi

if [ "X$1" = "X" ];
then
 echo "Usage: $0 <userid/passwd@connection> <table_name>"
# exit
 echo \c "Userid:"
 read userid1
 echo \c "Passwd:"
 echo off
 read passwd
 userid=$userid1$passwd
 echo on
else
 userid=$1
fi

if [ "X$2" = "X" ]; then 
 echo "No table in user $userid."
 echo "Usage: $0 <userid/passwd@connection> <table_name>"
 exit
else 
 table=$2
fi
 
#selectSql=`echo "select $fields from $table" |sed -e "s/,/||\',\'||/g"`
#echo selectSql=$selectSql
echo  "Begin to unload... please wait..."
sqlplus $userid <<! >/dev/null
 set COLSEP $sep;
 set echo off;
 set heading off ;
 set feedback off;
 set pagesize 0 ;
 set linesize 1000;
 set termout off;
 set trimout on;
 set trimspool on;
 spool wk_${table}.txt; 
  select $fields from $table $where $order;
 spool off;
 / 
 exit
 /
!

if [ "$?" -ne 0 ] ;
then
 echo "Error:sqlplus $userid error in unload table $table!! "
 echo "Please check userid and passwd or database."
 exit 
fi
cat wk_${table}.txt | sed -e '/^SQL>/d' -e '/^$/d' >$table.txt

if [[ `grep "ORA\-" ${table}.txt`  = "" ]];
then
 cat $table.txt|sed -e 's/[[:space:]]//g'>wk_${table}.txt
else 
 cat $table.txt
 err="$table"
fi
 

if [[  "X$err" = "X" ]];then
 echo "Unload table $table complete! "
else
 echo "Unload table $err error, please check it!"
 exit
fi
echo "Check the correctness..."
cnt1=`sqlplus $userid<<!  >/dev/null
    set echo off;
 set heading off ;
 set feedback off;
 set pagesize 0 ;
 set termout off;
 set trimout on;
 set trimspool on;
 spool cnt1.txt;
    select count(*) from $table $where;
    spool off;
    exit;
    /
<<! `
cnt1=`cat cnt1.txt|sed -e '/^SQL>/d' -e '/^$/d' -e 's/ //g' `
cnt2=`wc -l ${table}.txt |awk '{print($1)}'`

#echo "\$cnt1=$cnt1"
#echo "\$cnt2=$cnt2"

echo "表中记录=$cnt1 条,生成的文件行数=$cnt2 ."
if [ $cnt1 -eq $cnt2 ];
then
    echo "Congratulations,unload successful!"
else
    echo "Error:导出记录数与表中记录数不等,请检查表中是否有类型为char(n)的某个域的数据含有\n."
fi

mv wk_$table.txt $table.txt
rm -f cnt1.txt
############****************************************配置文件
#file:unload.ctl
#分隔符
sep=","
#输出字段,不能有空格连接;如果有空格需将=右边用""引起
fields="ORG_BIND_ACC_NBR,ACCT_MONTH_ID,ACCT_CYCLE_TMPL_ID,ACCT_CYCLE_ID,PARTITION_ID,SOURCE_TYPE,BUSINESS_KEY,CALL_TYPE,ORG_ACC_NBR_A,ORG_ACC_NBR_B,START_DATE,START_TIME,CALL_DURATION,END_DATE,END_TIME,TOTAL_METER_VALUE,PURE_METER_VALUE,SWITCH_AREA_CODE,SWITCH_ID,ORG_FILE_NAME,CDR_POS_IN_FILE,TRUNK_IN,TRUNK_OUT,CARD_NO,CARD_TYPE,IS_PREFEE,ORG_FEE1+ORG_FEE2+ORG_FEE3 ORG_FEE,VISIT_AREA_CODE_A,SWITCH_TYPE,BILLING_TYPE,OPER_SEQUENCE"
#条件,没有条件为空
where="where ACCT_MONTH_ID>='200410'"
#排序字段,没有条件为空
order= #"order by start_date"
#输出文件存放目录
destDir=.

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