Hint:Parameter 'in' is declared but never used in 'query_student'

1、错误描述

2、错误原因

create or replace procedure query_student(in id int) is
begin
  select * from t_stu_info t where t.id = id; end query_student;

编写Oracle存储过程时，传参时in、参数和参数类型位置不对

3、解决办法

create or replace procedure query_student(id in int) is
begin
  select * from t_stu_info t where t.id = id; end query_student;

create or replace procedure query_student(id in int,name out varchar2) is
begin
  select t.name into name from t_stu_info t where t.id = id;
end query_student;

Hint:Parameter 'in' is declared but never used in 'query_student'