--控制语句
--if
if condition then
statements;
elsif condition then
statements;
else
statements;
end if;
--case
case v_no
when 10 then
statements;
when 20 then
statements;
when 30 then
statements;
else
statements;
end case;
--------------
case
when v_no>30 then
statements;
when v_no>20 then
statements;
when v_no>10 then
statements;
end case;
--loop
loop
statements;
exit when condition;
end loop;
--while
while condition loop
statements;
end loop;
--for
for i in [reverse]
v_start..v_end loop
statements;
end loop;
--i是循环控制变量，不需要显式定义，v_start,v_end分别为下界值和上界值。如果指定reverse则循环变量自动减一。
begin
for i in reverse 1..10 loop
dbms_output.put_line(i);
end loop;
end;
--10,9,8,7,6,5,4,3,2,1
--嵌套循环
declare
result int;
begin
<<outer>>
for i in 1..10 loop
<<inner>>
for j in 1..10 loop
result:=i*j;
exit outer when i=9;
dbms_output.put_line(i||j);
end loop inner;
end loop outer;
end;posted on 2010-07-29 17:12
junly 阅读(337)
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oracle/mysql/sql