I the the following perl script, however it does not return anything. Did i form my syantax wrongly?

$sth=$dbh->prepare("select a.rowid,a.* from Table1 a 
  		      where a.field1 = \'$Indicator1\' 
  		      and a.schedule = \'$Indicator2\'  and a.lastdate <= sysdate");
  		 $sth->execute()

$sth=$dbh->prepare("select a.rowid,a.* from Table1 a 
  		      where a.field1 = 'Valid' 
  		      and a.schedule = 'Y'  and a.lastdate <= sysdate ");
  		 
$sth->execute()

Hi all, i found my mistake. I mixed up my columns. The escaping is fine. I also realised that without the \, it would also work.