SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER procedure [dbo].[usp_GetSysid]
        @name varchar(50),
        @initvalue int,
        @id int output
as 

/*===获取各种编号====*/
--开始事务
begin tran tr
--判断是否存在
if not exists(select * from sys_number where name=@name )
    begin
        insert into Sys_Number(name,value) values(@name,@initvalue)
    end
--取值
select @id=value from sys_number with(XLOCK) where name=@name 
if @id<@initvalue set @id=@initvalue
--更新值
update sys_number set value=@id+1 where name=@name --and value=@id

--提交事务
if @@error!=0 
begin
    rollback tran tr
    select 0
end
else
begin
    commit tran tr
    select @id
end

DECLARE    @return_value int,
        @id int

EXEC    @return_value = [dbo].[usp_GetSysid]
        @name = N'GH20250304', --前缀
        @initvalue = 1,  --初始值
        @id = @id OUTPUT  --返回顺序号，前台程序可以拼接上name