Question

BEGIN
    SET NOCOUNT ON;

    IF (UPDATE( HighestDegreeDoc) OR UPDATE (GPA) OR UPDATE (CreditHours))     
    BEGIN
        UPDATE [dbo].[School]
        SET Uploaded = 1
        FROM dbo.School
        JOIN INSERTED i ON i.EmpID = dbo.School.RecID
        END
    RETURN         
END

ALTER TRIGGER [dbo].[TrigEdu]
ON [dbo].[Education]
AFTER UPDATE
AS
BEGIN
    SET NOCOUNT ON;

    IF NOT (UPDATE( HighestDegreeDoc) OR UPDATE (GPA) OR UPDATE (CreditHours))     
    RETURN

    UPDATE [dbo].[School]
    SET Uploaded = 1
    FROM dbo.School
    JOIN INSERTED i ON i.EmpID = dbo.School.RecID
END

这两个代码都给了我相同的结果。我只希望这三个领域更改其中一个，然后School.RecID更新。但它的更新与任何教育表领域的任何更新约会。：（

Answer 1

在触发更新时，您可以访问新版本和旧版本的记录。您已经插入了新版本，只需要将它与旧版本的Deleted进行比较。

UPDATE dbo.School
SET Uploaded = 1
FROM dbo.School
JOIN INSERTED i ON i.EmpID = dbo.School.RecID
JOIN DELETED d ON d.EmpID = dbo.School.RecID
where i.HighestDegreeDoc != d.HighestDegreeDoc
or i.GPA != d.GPA
or i.CreditHours != d.CreditHours

标志使用触发器

1 个答案: