创建存储过程

-----存储过程的学习
--不带参数没有返回值的存储过程
/*
create proc usp_存储过程的名字
as
begin
  --语句
end
*/

create proc usp_Getdt_article
as
begin
  select * from dbo.dt_article
end
go
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--带参数的存储过程
/*
create proc usp_带参数存储过程名字
@参数名 类型,
@参数名 类型
as
begin
--语句
end
*/
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-- 使用存储过程实现转账
create proc usp_TransMoney
@from char(4),
@to    char(4),
@money money
as
begin
    begin transaction
    begin try
        update bank set balance = balance - @money where cId = @from;
        update bank set balance = balance + @money where cId = @to;
        commit transaction;
    end try
    begin catch
        rollback transaction;
    end catch;
end

----------------------------------------------------------------
----------------------------------------------------------------
-- 带有默认参数存储过程的语法
/*
create proc usp_带参数的存储过程
@参数名 类型 = 默认值,
@参数名 类型
as
begin
    -- 语句
end
*/

create proc usp_GetStudent
@stuNameTemp nvarchar(20) = 'all'
as
begin
    if(@stuNameTemp = 'all')
    begin
        --语句
    end
    else
    begin
        --语句
    end
end
go