如何在SQL Server 2005中使用触发器进行更新

Question

我有一个名为tbl_gallery的表，它有一列数据类型bit，名为isActive。

当用户更新IsActive值时，其他具有IsActive = true的行将自动变为false。

如何用更新的触发器做到这一点？

请帮

Answer 1

我想你想要的东西，如：

CREATE TRIGGER trgGalleryActive 
ON dbo.tbl_gallery 
FOR UPDATE 
AS 
    BEGIN 
     UPDATE g 
     -- Update all other gallery rows for this same user to false 
      SET g.IsActive = 0 
      FROM tbl_gallery g 
       INNER JOIN inserted i 
       on g.UserPK = i.UserPK 
      WHERE 
       -- However, we don't want current inserted records to be updated 
       g.TablePK <> i.TablePK 
          -- As per Marc's comment - don't update existing inactive rows unnecessarily 
          AND g.IsActive = 1 
          -- Only if this record is active should any of this happen 
          AND i.IsActive = 1 
    END 

Answer 2

触发用于更新第二个表更新后的第一个表：仅更新行

CREATE TRIGGER update_table_cityUpdated_afterTable_cityUpdate 
    ON Table_city 
    AFTER UPDATE AS 
BEGIN 
    DECLARE @cityId AS BIGINT 
    DECLARE @stateId AS BIGINT 
    DECLARE @CityName AS NVARCHAR(200) 

    SELECT @cityId=cityId FROM INSERTED 
    SELECT @stateId= stateId FROM INSERTED 
    SELECT @CityName= CityName FROM INSERTED 
    UPDATE table_cityUpdated 
SET 
    [dbo].[table_cityUpdated].stateId=@stateId, 
    [dbo].[table_cityUpdated].CityName=@CityName 
    WHERE [dbo].[table_cityUpdated].cityId=@cityId 
END 
;