oracle存储过程学习

*: 存储过程创建

1. 输出查询结果(dbms_output.put_line('用户名为：'||u_name);)

create or replace procedure p002test
is
u_name varchar2(100);
begin
select user_name into u_name from t_user;
dbms_output.put_line('用户名为：'||u_name);
end p002test;

2. 简单循环(for xx in list loop xxxxx end loop)

create or replace procedure p002test
is
cursor u_cursor is select user_name, user_remark from t_user;
begin
for u_record in u_cursor loop
dbms_output.put_line(u_record.user_name||': '||u_record.user_remark);
end loop;
end p002test;

3. 传递参数，使用简单异常（当需要输出参数的时候，使用out，或者in out，默认为in）

create or replace procedure p002test(p_user_id in number, p_user_password in varchar2)
is
begin
update t_user set user_password=p_user_password where user_id = p_user_id;
commit;
exception
when others then
dbms_output.put_line('修改失败，回滚。');
rollback;
end p002test;

4. 异常信息打印（sqlcode: 异常码，sqlerrm:异常详细）

create or replace procedure p002test(p_user_id in number, p_user_password in varchar2)
is
begin
update t_user set user_password=p_user_password where user_id = p_user_id;
commit;
exception
when others then
dbms_output.put_line('修改失败，回滚。errorCode:' || sqlcode || ' errorText:' || substr(sqlerrm,1,200));
rollback;
end p002test;

**: 存储过程调用

1.

begin
p002test();
end;

2.

call p002test();
call p002test(1, '123');

***: 存储过程删除

drop procedure 存储过程名字;