Oracle Database Discussions

Hi all,

i need a way to save in a unix variable a value retrieved from sqlplus;

I saw this example, (from ask tom site), but there is no explanation about what means the -s option

code=`sqlplus -s / << EOF

select max(sal)

from emp

where empno=934;

EOF`

echo $code

I need a very easy example to store a value retrieved from sqlplus to a unix variable in a shell script.