Hi evrybody!!!!

I have a problem with this shell script

INICIO=$(sqlplus -s user/user@db1 << END | awk '{printf $1}'
set head off
set feed off
select to_char(min(create_dt) , 'HH24') from table_name where trunc(create_dt)=trunc(sysdate-2);
END)

I want to recover, in INICIO, the min time from a group of records but the problem is I am using the to_char command with (') symbol, as you see in the example 'HH24'. With Oracle it works OK, directly by sqlplus. But with sh scripts it doesn't. I tried with '' double single quoted or " double quoted and \' but the problem continues, could somebody have an advice to solve the problem?

Thanks

José