將觸發器從FB轉換爲MSSQL

我需要你的幫助。我使用Firebird數據庫的觸發器。現在我已經更改爲MSSQL 2014數據庫。我有一個觸發器，我無法將其轉換。請給我你的幫助。我需要以下觸發器MSSQL將觸發器從FB轉換爲MSSQL

CREATE TRIGGER AUTOGENEHMIGEN_BU FOR DATEPARAMS 
ACTIVE BEFORE INSERT POSITION 0 
AS 
DECLARE VARIABLE dutyuid integer; 

BEGIN 
if (new.PARAMUID in (2,25) and new.AVALUE > CURRENT_DATE-7) then 
begin 
    select uid from duties where uid=new.DUTYUID 
    into :dutyuid; 
    if(dutyuid>0) then 
     update duties set status='R' where uid=:dutyuid; 
end 
END

工作謝謝你的努力

來源

2017-04-25 Joseph

你有什麼試過的？不要指望我們做你的工作......但是如果遇到特定問題，我們可以提供幫助！ – jarlh

我沒有什麼好主意，因爲「之前改爲」在MSSQL中是不可能的。而是用以下方式初始化一個變量：我必須使用@ - >這是正確的嗎？ – Joseph

有很多，你需要看的東西。 MSSQL不支持觸發器之前或逐行觸發器（因此您不能使用新的或舊的結構），並且您必須使用遊標來逐行模擬行觸發器。

爲了給你一個開始，這裏給出了一個更新後的觸發器，用戶將新舊值寫入錯誤表。

USE [Sandbox] 
GO 

/****** Object: Table [dbo].[users] Script Date: 25/04/2017 16:01:35 ******/ 
SET ANSI_NULLS ON 
GO 

SET QUOTED_IDENTIFIER ON 
GO 

SET ANSI_PADDING ON 
GO 

CREATE TABLE [dbo].[users](
    [user_id] [int] NULL, 
    [contact_type_id] [int] NULL, 
    [value] [varchar](20) NULL 
) ON [PRIMARY] 

GO 

SET ANSI_PADDING OFF 
GO 

user_id  contact_type_id value 
----------- --------------- -------------------- 
1   2    aaa 
1   3    aaa 
2   1    [email protected] 
3   1    [email protected] 
3   2    123345 
3   3    skypeLogin2 

(6 row(s) affected) 

--drop trigger tai_users 
CREATE TRIGGER TAI_users 
on users 
after update 
AS 

BEGIN 
declare old cursor for select value from deleted 
declare new cursor for select value from inserted 
declare @oldvalue as varchar(20) 
declare @newvalue as varchar(20) 

open old 
open new 
fetch next from old into @oldvalue 
fetch next from new into @newvalue 
    insert into errors (msg) values (concat(@oldvalue,',',@newvalue)) 
WHILE @@FETCH_STATUS = 0 
BEGIN 
     FETCH NEXT FROM old INTO @oldvalue 
     fetch next from new into @newvalue 
     insert into errors (msg) values (concat(@oldvalue,',',@newvalue)) 
END 
    close old 
    close new 
    deallocate old 
    deallocate new 
END 

--truncate table errors 
update users 
    set value = 'bbb' 
    where user_id = 1 

select * from errors 
select * from users 

2   aaa,bbb 
3   aaa,bbb 
4   aaa,bbb 

(4 row(s) affected) 

user_id  contact_type_id value 
----------- --------------- -------------------- 
1   2    bbb 
1   3    bbb 
2   1    [email protected] 
3   1    [email protected] 
3   2    123345 
3   3    skypeLogin2

來源

2017-04-25 15:15:30

將觸發器從FB轉換爲MSSQL

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