--阶段4：添加一个入住客人的信息
IF EXISTS(SELECT * FROM sysobjects WHERE name='usp_insertGuestRecord')DROP PROC usp_insertGuestRecord
GO
CREATE procedure usp_insertGuestRecord@GuestID int OUTPUT,                ---客户流水号@identityID varchar(50),            ---身份证号@guestName nchar(20),                ---客户姓名@roomID int,                        ---房间号@ResideDate datetime,                ---入住时间@deposit decimal(18,2) = 1000        ---押金ASSET @GuestID = -1IF (@identityID IS NULL OR LEN(@identityID) <> 18)return -1BEGIN TRANSACTIONINSERT INTO GuestRecord(IdentityID,GuestName,RoomID,ResideID,ResideDate,Deposit)VALUES(@identityID,@guestName,@roomID,1,@ResideDate,@deposit)IF (@@ERROR <> 0)BEGINROLLBACK TRANSACTIONreturn 'false'ENDDECLARE @RoomStateID intSELECT @RoomStateID=RoomStateID FROM RoomStateWHERE RoomStateName = '已入住'---客房状态变为“入住”，客人数量增1Update Room set RoomStateID =@RoomStateID,GuestNum=GuestNum+1WHERE RoomID = @roomIDIF (@@ERROR <> 0)BEGINROLLBACK TRANSACTIONreturn -1ENDCOMMIT TRANSACTIONSET @GuestID=@@IDENTITYreturn 0
GO--调用存储过程
DECLARE @identityID varchar(50)            ---身份证号
DECLARE @guestName nchar(20)            ---客户姓名
DECLARE @roomID int                        ---房间号
DECLARE @deposit decimal(18,2)            ---押金
DECLARE @ResideDate datetime            ---入住时间
DECLARE @Result varchar(20)
DECLARE @GuestID intSET @identityID = '11010119950506112x'
SET @guestName = '风无痕'
SET @roomID = 1008
SET @deposit = 1000
SET @ResideDate = GETDATE()EXEC @Result = usp_insertGuestRecord @GuestID OUTPUT,@identityID,@guestName,@roomID,@ResideDate,@deposit
IF (@Result = 0)
BEGINPRINT '插入客人记录操作成功' PRINT '客人编号是' + CAST(@GuestID AS varchar)
END
ELSEPRINT '插入客人记录操作失败' 

--使用事物删除room表里面已经退房的旅客
begin transaction
declare @errorNum  int --错误的号码
set @errorNum=0
select *  into historyGuest from  GuestRecord
where LeaveDate is not null
set @errorNum=@errorNum+@@ERROR
delete  from  GuestRecord
where LeaveDate is not null
set @errorNum=@errorNum+@@ERROR
if(@errorNum<>0)
begin
print '删除失败，事物回滚'
rollback transaction
end
else
begin
print '删除成功'
commit transaction
end