oracle存储过程中return和exit区别概述及测试

create or replace procedure test5(o_cellphone in varchar2) is
v_cellphone cc_quiz_stat.cellphone %type;
v_name cc_quiz_stat %rowtype;
v_state cc_quiz_stat.state %type;
begin
declare
cursor cur_cc is
select * from cc_quiz_stat;
cursor cur_jc(v_n varchar2) is
select state from cc_quiz_stat;
begin
open cur_cc;
loop
fetch cur_cc
into v_name;
exit when cur_cc%notfound;
open cur_jc(o_cellphone);
loop
fetch cur_jc
into v_state;
exit when cur_jc %notfound;
if (o_cellphone = v_name.cellphone) then
return;
else
dbms_output.put_line('手机号' || v_name.cellphone || '省份' ||
v_state);
end if;
end loop;
close cur_jc;
end loop;
close cur_cc;
end;
end test5;

执行结果
手机号[phone]省份全国
手机号[phone]省份南京
手机号[phone]省份天津
手机号[phone]省份 上海
手机号[phone]省份北京

create or replace procedure test5(o_cellphone in varchar2) is
v_cellphone cc_quiz_stat.cellphone %type;
v_name cc_quiz_stat %rowtype;
v_state cc_quiz_stat.state %type;
begin
declare
cursor cur_cc is
select * from cc_quiz_stat;
cursor cur_jc(v_n varchar2) is
select state from cc_quiz_stat;
begin
open cur_cc;
loop
fetch cur_cc
into v_name;
exit when cur_cc%notfound;
open cur_jc(o_cellphone);
loop
fetch cur_jc
into v_state;
exit when cur_jc %notfound;
if (o_cellphone = v_name.cellphone) then
exit;
else
dbms_output.put_line('手机号' || v_name.cellphone || '省份' ||
v_state);
end if;
end loop;
close cur_jc;
end loop;
close cur_cc;
end;
end test5;

执行结果
手机号[phone]省份全国
手机号[phone]省份南京
手机号[phone]省份天津
手机号[phone]省份 上海
手机号[phone]省份北京
手机号[phone]省份全国
手机号[phone]省份南京
手机号[phone]省份天津
手机号[phone]省份 上海
手机号[phone]省份北京
手机号[phone]省份全国
手机号[phone]省份南京
手机号[phone]省份天津
手机号[phone]省份 上海
手机号[phone]省份北京
手机号[phone]省份全国
手机号[phone]省份南京
手机号[phone]省份天津
手机号[phone]省份 上海
手机号[phone]省份北京

return 跳出整个循环，本循环后面的不再执行，
exit 跳出本次循环，下次继续执行本次循环