shell脚本给变量赋值出现的怪问题，高手看看啊

[haokunao]

#if [ $# != 1 ]; then
# echo "Usage:"
# echo " $0 <MMDD>"
# exit 1
#fi
#!/usr/bin/ksh
. /home/oracle/.profile

FILE=${HOME}/static/SZ/SZMonitor.txt

DBUSERPWD=xxx/xxx
sqlplus -s ${DBUSERPWD} <<EOF > /dev/null

set serveroutput on size 10;
set term off;
set echo off;
set timing off;
set heading off;
set feedback off;
set pagesize 0;
set linesize 10;
set trimspool off;
set trimout off;
set newp none;
set WRAP off;

spool ${FILE};
select count(*) from LOG a where to_char(a.DATE,'yyyymmdd')=to_char(sysdate,'yyyymmdd') and status='0';
spool off;
/
EOF

yesOrNo=cat|cut -c 10-10 ${FILE}
echo ${yesOrNo}

if [ ${yesOrNo} = 0 ]
then
echo EveythingIsOk
else
echo Wrong
fi
exit
单执行cat|cut -c 10-10 ${FILE}命令可以显示SZMonitor.txt的第十位字符，但是脚本里却无法赋值给yesOrNo，echo ${yesOrNo}结果为空，这是为什么？

[zhang_water]

yesOrNo=`cat|cut -c 10-10 ${FILE} `

command substitution 的形式必须为 `` 或者 $( )

[zhang_water]

代码不好看啊，试试，没用过..

 yesOrNo=`cat|cut -c 10-10 ${FILE} `  

[zhang_water]

引用

yesOrNo=`cat|cut -c 10-10 ${FILE} `

[haokunao]

谢谢，明天就去试试