触发器将如何工作？

使用SQL Server 2000触发器将如何工作？

我在做新的数据库

CREATE TRIGGER [CARDEVENTSAVING] ON [dbo].[T_CARDEVENT] 
AFTER INSERT 
AS 

DECLARE @EDATE VARCHAR(50) 
DECLARE @ETIME VARCHAR(50) 
DECLARE @EDOOR NVARCHAR(50) 
DECLARE @EFLOOR NVARCHAR(50) 
DECLARE @EMPID NVARCHAR(50) 
DECLARE @TAG NVARCHAR(50) 
DECLARE @ENAME NVARCHAR(50) 
DECLARE @ELNAME NVARCHAR(50) 
DECLARE @EPART NVARCHAR(50) 
DECLARE @EDEP NVARCHAR(50) 
DECLARE @EFUNCTION NVARCHAR(50) 
DECLARE @STATUS NVARCHAR(50) 
DECLARE @EDATE2 DATETIME 


SELECT @EDATE =(SELECT CARDEVENTDATE FROM INSERTED) 
SELECT @ETIME =(SELECT CARDEVENTTIME FROM INSERTED) 
SELECT @TAG = (SELECT CARDNO FROM INSERTED) 

IF LEN(@TAG) = 4 
SELECT @TAG = '0000'[email protected] 
ELSE IF LEN(@TAG) = 5 
    SELECT @TAG ='000'[email protected] 
ELSE IF LEN(@TAG) = 6 
    SELECT @TAG = '00' + @TAG 
ELSE IF LEN(@TAG) = 7 
    SELECT @TAG = '0' + @TAG 

SELECT @EDOOR = (SELECT DOOR FROM T_PERSONALTRACKING WHERE CARDNO = @TAG) 
SELECT @EFLOOR = (SELECT FLOOR FROM T_PERSONALTRACKING WHERE CARDNO = @TAG) 
SELECT @EMPID = (SELECT SABUN FROM DATALINEDB.DBO.PERSON WHERE TAGNO = @TAG) 
SELECT @ENAME = (SELECT NAME FROM DATALINEDB.DBO.PERSON WHERE TAGNO = @TAG) 
SELECT @ELNAME = (SELECT LastName FROM DATALINEDB.DBO.PERSON WHERE TAGNO = @TAG) 
SELECT @EPART = (SELECT PART FROM DATALINEDB.DBO.PERSON WHERE TAGNO = @TAG) 
SELECT @EDEP = (SELECT MBUSO FROM DATALINEDB.DBO.PERSON WHERE TAGNO = @TAG) 
SELECT @EFUNCTION = (SELECT FUNCTIONKEY FROM INSERTED) 
SELECT @EDATE2 =(SELECT CARDEVENTDATE FROM INSERTED) 

INSERT INTO 
    FINGERPRINTDB.DBO.HISTORY(EDATE, ETIME, EDOOR, EFLOOR, ESABUN, ETAG, 
          ENAME, ELNAME, EPART, EDEP, ESTATUS, EFUNCTION, 
          EINOUT, EDATE2) 
VALUES 
    (@EDATE, @ETIME, @EDOOR, @EFLOOR, @EMPID, @TAG, 
    @ENAME, @ELNAME, @EPART, @EDEP, NULL, @EFUNCTION, 
    NULL, @EDATE2)

上面的查询已成功执行触发器？但是旧数据库中的行不受影响。

我在新的数据库中插入一个新的行，然后我检查旧的数据库，没有影响？

如何从其他数据库中获取数据？

来源

2009-09-27 Gopal

假设在插入的表中只有一行，就会写入您的触发器。如果触发该触发器的插入操作影响多于一行，则插入的表中将有多行。 – GilaMonster 2009-09-27 10:26:27

未从您的意见中清除 – Gopal 2009-09-27 10:38:12

我想你需要的是：

CREATE TRIGGER [CARDEVENTSAVING] ON [dbo].[T_CARDEVENT] 
AFTER INSERT 
AS 
INSERT oldDB.DBO.HISTORY (id, event, ...) 
SELECT id, event, ... 
FROM inserted

插入的“表”包含了所有的新数据，“表”被删除的删除数据的容器。当更新发生时，'表'被填满。

来源

2009-09-27 08:58:19 Arthur

触发器将如何工作？

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