loop循环的几种用法

loop循环：

create or replace procedure pro_test_loop is

i number;

begin

i:=0;

loop

i:=i+1;

dbms_output.put_line(i);

if i>5 then

exit;

end if;

end loop;

end pro_test_loop;

while循环：

create or replace procedure pro_test_while is

i number;

begin

i:=0;

while i<5 loop

i:=i+1;

dbms_output.put_line(i);

end loop;

end pro_test_while;

for循环1：

create or replace procedure pro_test_for is

i number;

begin

i:=0;

for i in 1..5 loop

dbms_output.put_line(i);

end loop;

end pro_test_for;

for循环2：

create or replace procedure pro_test_cursor is

userRow t_user%rowtype;

cursor userRows is

select * from t_user;

begin

for userRow in userRows loop

dbms_output.put_line(userRow.Id||','||userRow.Name||','||userRows%rowcount);

end loop;

end pro_test_cursor;