SQL如何创建存储过程

https://www.cnblogs.com/jiangyunfeng/p/12154681.html 谢大哥
https://www.cnblogs.com/1219zy/p/8328940.html




USE CMS  
----Use 是跳转到哪个数据库，对这个数据库进行操作。
GO       
----GO向 SQL Server 实用工具发出一批 Transact-SQL 语句结束的信号,相当于提交上面的SQL语句。
----GO是把t-sql语句分批次执行。（一步成功了才会执行下一步,即一步一个GO）
/****** Object:  StoredProcedure [dbo].[PROC_four_five_hr]    Script Date: 07/30/2018 13:44:55 ******/
----这一段是介绍本存储过程名字和创建时间
----/*  */   是注释掉很多行内容的符号
----object 对象 的意思
----storeprocedure  存储过程 的意思
----dbo 是每个数据库的默认用户，具有所有者权限
----dbo后面是存储过程的名称
----script date 脚本 创建时间
SET ANSI_NULLS ON
GO
----
SET QUOTED_IDENTIFIER ON
GO
----

/*首先准备数据,测试存储过程
use ssqadm;

--创建测试books表
create table books_test (
    book_id int identity(1,1) primary key,
    book_name varchar(20),
    book_price float,
    book_auth varchar(10)
);
--插入测试数据
insert into books_test
  (book_name,book_price,book_auth)
  values
        ('论语',25.6,'孔子'),
        ('天龙八部',25.6,'金庸'),
        ('雪山飞狐',32.7,'金庸'),
        ('平凡的世界',35.8,'路遥'),
        ('史记',54.8,'司马迁');

    select * from books_test;

*/
   
   --1.创建无参存储过程
if (exists (select * from sys.objects where name = 'getAllBooks'))
    drop proc getAllBooks
go
create procedure getAllBooks
as
begin
select * from books_test;
--调用,执行存储过程
exec getAllBooks;
end
go
--2、修改存储过程

alter procedure getallbooks
as 
select book_name from books_test;

--3、删除存储过程
drop procedure getallbooks;

go
--4、修改存储过程的名称
sp_rename getallbooks,proc_get_allbooks;

go
exec proc_get_allbooks;
go

--5、创建带参数的存储过程

use ssqadm
 go
if (exists (select * from sys.objects where name = 'searchbooks'))
drop proc searchbooks
-- exec searchbooks  1;--执行存储searchbooks得到如下结果:
go
create procedure searchbooks (@bookid int)--括号里面是
as 
begin
declare  @book_id int;----定义一个标量变量,只是保证存储过程的完整性，在本存储是多此一举的。
set @book_id = @bookid;
select* from books_test where book_id = @book_id;
end;
go
-- exec searchbooks  1;--执行存储searchbooks得到如下结果:

--6、创建带两个参数的存储过程

use ssqadm
 go
if (exists (select * from sys.objects where name = 'book_test2'))
drop proc book_test2
-- exec book_test2  1;--执行存储book_test2得到如下结果:
go
create procedure book_test2 (@bookid int,@bookname varchar(20))--括号里面是
as 
begin
declare  @book_id int;----定义一个标量变量,只是保证存储过程的完整性，在本存储是多此一举的。
declare  @book_name varchar(20);
set @book_id = @bookid;
set @book_name = @bookname;
select* from books_test where book_id = @book_id and book_name = @book_name;
end;
go
-- exec book_test2  1,'论语';--执行存储book_test2得到如下结果:

--7、创建带有返回值的存储过程
use ssqadm
go
if (exists (select * from sys.objects where name = 'book_test3'))
drop proc book_test3

go
create procedure book_test3(@bookid int,@out_book_name varchar(20) output)
as
declare @book_id  int;
set @book_id = @bookid;

begin
select @out_book_name = book_name from books_test where book_id= @book_id;
end
go

-- --执行存储book_test2得到如下结果:
--执行存储过程
declare @out_name varchar(20) --声明一个变量用来接收执行存储过程后的返回值
exec book_test3 1,@out_name output
select @out_name as out_book_name;--as是给返回的列值起一个名字

　附带另一位大哥的调用

--根据loginId查询教员信息
if OBJECT_ID('SelectTeacherByLoginId') is not null
drop procedure SelectTeacherByLoginId
go
create procedure SelectTeacherByLoginId
@LoginId varchar(50) --参数
as
select TeacherID, TeacherName,Sex,LoginId,LoginPwd,Birthday,UserState,t.UserStateId
from Teacher t,UserState u where t.UserStateId=u.UserStateId and LoginId=@LoginId
go
--调用
exec SelectTeacherByLoginId 't001'

　Vs中代码调用

#region 根据LoginID查询教员信息
        //根据LoginID查询教员信息
        public static Teacher SelectTeacherByLoginId(string loginId)
        {
            Teacher tea = null;
            string sql = "SelectTeacherByLoginId";
            SqlDataReader dr = DBHelper.ExecteReader(sql,
               CommandType.StoredProcedure //调用存储过程
               ,
               new SqlParameter[] {new SqlParameter("@LoginId",loginId)}
               );
            if (dr.Read())
            {
                tea = new Teacher();
                tea.TeacherID = Convert.ToInt32(dr["TeacherID"]);
                tea.LoginId = dr["LoginId"] + "";
                tea.LoginPwd = dr["LoginPwd"] + "";
                tea.TeacherName = dr["TeacherName"] + "";
                tea.Sex = dr["Sex"] + "";
                tea.UserState = dr["UserState"] + "";
                tea.UserStateId = Convert.ToInt32(dr["UserStateId"]);
                tea.Birthday = Convert.ToDateTime(dr["Birthday"]);
            }
            dr.Close();
            DBHelper.CloseCon();
            return tea;
        } 
        #endregion