存储过程

Posted 2020-08-22 陆伟

CREATE [OR REPLACE] PROCEDURE procedure_name
    [ (parameter [,parameter]) ]

IS
    [declaration_section]

BEGIN
    executable_section

[EXCEPTION
    exception_section]

END [procedure_name];

先初始化数据。

create table students
( 
  ID int,
  userName varchar(100),
  userPass varchar(100),
  userAge  int
)
begin
insert into students values(1,‘jack‘,‘jjjaa‘,23);
insert into students values(2,‘rose‘,‘jjjaa‘,21);
insert into students values(3,‘lucy‘,‘jjjaa‘,22);
insert into students values(4,‘Tony‘,‘jjjaa‘,24);
end;
commit;

新建一个存储过程，对于某个用户添加年龄

create or replace procedure  SP_Update_Age
(
 uName in varchar,--note,here don‘t have length ,sql have lenth ,not in oracle.
 Age in int
)
as
begin
    update students set UserAge = UserAge + Age where userName = uName;
    commit;
end SP_Update_Age;  

执行存储过程

call SP_UPDATE_AGE(‘jack‘,1);  

call和exec的区别：

1. 但是exec是sqlplus命令，只能在sqlplus中使用；call为SQL命令，没有限制.

2. 存储过程没有参数时,exec可以直接跟过程名（可以省略()），但call则必须带上().