Oracle if else if for case

------------------游标+for+if else if
DECLARE cursor s_cursor is SELECT * from emp;--定义游标
begin
    for r in s_cursor loop--循环
     if r.deptno=10--if判断
     then dbms_output.put_line('名字:'||r.ename||'sal'||r.sal);
     else if r.deptno=20
     then dbms_output.put_line('名字:'||r.ename||'sal'||r.sal);
     else if r.deptno=30
     then dbms_output.put_line('名字:'||r.ename||'sal'||r.sal);
     end if;end if;end if;
    end loop;
end;
-----------------------case
select ename, deptno, sal,
case
  when deptno=10 then sal+10
  when deptno=20 then sal+20
  else sal end as addsal
from emp;
-------------if
begin
  if(1!=1)
  then
   dbms_output.put_line('000');
  else if(10>2)
   then
   dbms_output.put_line('abc');
  end if;
  end if;---注意这里
end;

-----------for循环
DECLARE num number;
begin
 select count(*) into num from emp;
 for r in 1..num
 loop
  dbms_output.put_line(r);
 end loop;
end;