-----------------
declare k in integer
declare sum1 in integer
set k =10
if k> 10 then
sum1:= k *10;
end if;
select sum1;
declare k in integer
declare sum1 in integer
set k =10
if k> 10 then
sum1:= k *10;
end if;
select sum1;
select sum1;这个也不对
k number;
sum1 number;
BEGIN
k :=10 ;
if k> 10 then
sum1:= k *10;
dbms_output.put_line(sum1);
end if;
END;