触发插入到表从另一个表

Question

一个“SELECT SUM”我有这2个表：

数据在AUX已复制日期表，表中，必须有没有重复的日期，但添加重复日期的总数。

ej。 05/01/2017 = 123 + 123 + 123.

我认为当表中的数据a aux有新数据时，触发器应该执行这项工作。

Answer 1

CREATE TRIGGER [dbo].[trgAfterInsert] ON [dbo].[Table_a_aux] 
After Insert 
AS 
BEGIN 

Declare @dDate as Date; 
Declare @iTotal as int; 

Select 
    @dDate = i.[date], 
    @iTotal = i.total 
From inserted i; 


IF EXISTS (Select [date] from Table_a where [date] = @dDate) 
BEGIN 
Update Table_a 
    SET total = total + @iTotal 
WHERE 
    [date] = @dDate 
END 
ELSE 
BEGIN 
INSERT INTO Table_a ([date],total) Values (@dDate,@iTotal) 
END