SQL 트리거를 만들어 이전 트리거를 뒤집습니다.

Question

여러 트리거를 만들려고합니다. Crystal Reports에서 같은 양식의 '재 인쇄'필드가 업데이트되면 하나의 트리거가 'ysnAcknowledged'필드를 업데이트합니다. 두 번째 트리거는 사용자가 'ysnAcknowledged'필드를 수동으로 업데이트하는 경우 (양식 확인란) '재 인쇄'필드를 업데이트해야합니다. 나는 첫 번째 방아쇠를 가지고 있는데, 내 문제는 'ysnAcknowledged'필드를 업데이트하면 두 번째 방아쇠가 효과적으로 이동하기 전에 첫 번째 방아쇠를 뒤집을 것이다.

1 트리거 :

CREATE TRIGGER SOPickListReprint 
ON dbo.SalesOrder 
AFTER UPDATE 
AS 

IF UPDATE(Reprint) 
UPDATE dbo.SalesOrder 
SET ysnAcknowledged = 1 

2 트리거 :

CREATE TRIGGER SOPickListUpdate 
ON dbo.SalesOrder 
AFTER UPDATE 
AS 

IF UPDATE(ysnAcknowledged) 
UPDATE dbo.SalesOrder 
SET Reprint = 0 

Answer 1

내 솔루션 :

CREATE TRIGGER SOPickListReprint 
ON dbo.SalesOrder 
AFTER UPDATE 
AS 

UPDATE dbo.SalesOrder 
SET ysnAcknowledged = CASE WHEN deleted.Reprint = 0 AND inserted.Reprint = 1 THEN 1 ELSE inserted.ysnAcknowledged END, 
Reprint = CASE WHEN deleted.ysnAcknowledged = 1 AND inserted.ysnAcknowledged = 0 THEN 0 ELSE inserted.Reprint END 
FROM SalesOrder 
INNER JOIN 
inserted 
    ON inserted.SalesOrderID = SalesOrder.SalesOrderID 
INNER JOIN 
deleted 
    ON deleted.SalesOrderID = SalesOrder.SalesOrderID 

Answer 2

CREATE TRIGGER SOPickListUpdate 
    ON dbo.SalesOrder 
    AFTER UPDATE 
AS 

-- Update only rows where Reprint changed or ysnAcknowledged changed 
-- > If ysnAcknowledged changed, force Reprint to 0, otherwise leave it as it is 
-- > If Reprint changed, force ysnAcknowledged to 1, otherwise leave it as it is 
UPDATE 
    SalesOrder 
SET 
    Reprint   = CASE WHEN inserted.ysnAcknowledged <> deleted.ysnAcknowledged THEN 1 ELSE inserted.Reprint END, 
    ysnAcknowledged = CASE WHEN inserted.Reprint   <> deleted.Reprint   THEN 0 ELSE inserted.ysnAcknowledged END 
FROM 
    SalesOrder 
INNER JOIN 
    inserted 
     ON inserted.<primary_key> = SalesOrder.<primary_key> 
INNER JOIN 
    deleted 
     ON deleted.<primary_key> = SalesOrder.<primary_key> 
WHERE 
     inserted.ysnAcknowledged <> deleted.ysnAcknowledged 
    OR inserted.Reprint   <> deleted.Reprint