USE [Jiao]
GO
/****** Object:  Trigger [dbo].[tri_ds_insert]    Script Date: 01/14/2015 22:22:35 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER TRIGGER [dbo].[tri_ds_insert] 
   ON  [dbo].[t_DynamicScore]
   for INSERT
AS 
BEGIN
	--定義變數
    declare @Teaching int,--教學總分
            @Environmental int,--環境總分
		@Cars int,--車輛總分
		@Teacher int,--教練總分
		@sumsum int,--評分總條數
		@teacsum int,--對某位教練評論的總條數
		@SchoolID varchar(50),--駕校ID
		@TeacherID varchar(50);--教師ID
    --在inserted表中查詢已經插入記錄資訊
    select @SchoolID = SchoolID,@TeacherID = TeacherID from inserted;
    --獲得教學總分
    select @Teaching=SUM(Teaching) from t_DynamicScore where 
 
[email protected];
    --環境總分
    select @Environmental=SUM(Environmental) from t_DynamicScore where [email protected];
    --車輛總分
    select @Cars=SUM(Cars) from t_DynamicScore where [email protected];
    --教練總分
    select @Teacher=SUM(Teacher) from t_DynamicScore where [email protected]
 
;
    --獲得教學打分的數量
    select @sumsum=COUNT(id) from t_DynamicScore where [email protected];
    --對某位教練評分的總條數
    select @teacsum=COUNT(id) from t_DynamicScore where [email protected];
    --除法，小數點後保留4位，為該駕校最新的教學DSR
    update t_DSchool set Teaching=CONVERT(decimal(8,4),@Teaching*1.0000/@sumsum),--這裡乘以1.0000就為了得到的資料精確到小數點後4位
						 Environmental=CONVERT(decimal(8,4),@Environmental*1.0000/@sumsum),
						 Cars=CONVERT(decimal(8,4),@Cars*1.0000/@sumsum)
						 where 
 
[email protected];
	update t_Teacher set DSR=CONVERT(decimal(8,4),@Teacher*1.0000/@teacsum) where [email protected];
END