SQL Server:如何创建存储过程

问题描述

我正在从一本书中学习 sql，我正在尝试编写一个存储过程，但我不相信我做对了.以下方式在 Microsoft SQL 中无效吗?如果不是，它什么时候有效，如果有的话?

I'm learning sql from a book and I'm trying to write a stored procedure but I don't believe that I'm doing it correctly. Is the following way not valid in Microsoft SQL? If not, when is it valid, if ever?

create procedure dept_count(in dept_name varchar(20), out d_count integer)
   begin
     select count(*) into d_count
     from instructor
     where instructor.dept_name=dept_count.dept_name
   end

我收到以下错误

消息 156，级别 15，状态 1，过程 wine_change，第 1 行关键字in"附近的语法不正确.

Msg 156, Level 15, State 1, Procedure wine_change, Line 1 Incorrect syntax near the keyword 'in'.

推荐答案

T-SQL

/* 
Stored Procedure GetstudentnameInOutputVariable is modified to collect the
email address of the student with the help of the Alert Keyword
*/



CREATE  PROCEDURE GetstudentnameInOutputVariable
(

@studentid INT,                   --Input parameter ,  Studentid of the student
@studentname VARCHAR (200) OUT,    -- Output parameter to collect the student name
@StudentEmail VARCHAR (200)OUT     -- Output Parameter to collect the student email
)
AS
BEGIN
SELECT @studentname= Firstname+' '+Lastname, 
    @StudentEmail=email FROM tbl_Students WHERE studentid=@studentid
END