Question

我正在创建两个触发器。一个用于捕获Rewards表的插入值，另一个用于捕获Rewards表的已删除值。触发器主要功能是记录对审计表进行的更改类型。

audit_insert_trigger的SQL是：

CREATE TRIGGER tr_rewards_insert 
ON Rewards AFTER INSERT, UPDATE 
AS IF UPDATE(category)
    BEGIN
    DECLARE @category   char(6)
    DECLARE @type_change    char(20)

    SELECT @category = (SELECT category FROM inserted)  

    IF EXISTS (SELECT * FROM inserted)
        BEGIN 
            SELECT @type_change = 'Inserted'
        END 
    INSERT INTO audit_rewards
        VALUES (
        @category, USER_NAME(), GETDATE(), @type_change)
END 

CREATE TRIGGER tr_rewards_delete
ON Rewards AFTER UPDATE 
AS IF UPDATE(category)
BEGIN
DECLARE @category   char(6)
DECLARE @type_change    char(20)

SELECT @category = (SELECT category FROM deleted)   

IF EXISTS (SELECT * FROM deleted)
    BEGIN 
        SELECT @type_change = 'Deleted'
    END 

INSERT INTO audit_rewards
    VALUES (
    @category, USER_NAME(), GETDATE(), @type_change)
 END

我的想法是只更换“插入”的位置并将其“删除”。我不是真正理解1.关于为什么不起作用的逻辑2.如何将删除的值放入审计表并记录它是删除。

无法在一个触发器中进行。必须是两个独立的触发器。

Answer 1

您的insert触发器不正确。我认为应该是：

CREATE TRIGGER tr_rewards_insert 
ON Rewards AFTER INSERT, UPDATE 
AS IF UPDATE(category)
BEGIN
    INSERT INTO audit_rewards
        SELECT 'INSERTED, USER_NAME(), GETDATE(), category
        FROM inserted;
END;

DELETED触发器基本上是相同的。绝不假设inserted和deleted只有一行。

Answer 2

找出答案：

CREATE TRIGGER tr_rewards_insert 
ON Rewards AFTER INSERT, UPDATE 
    AS IF UPDATE(category)
    BEGIN
    DECLARE @category   char(2)
    DECLARE @type_change    char(20)
    SELECT @category = (SELECT category FROM inserted)  
    SELECT @type_change = 'Inserted'

    INSERT INTO audit_rewards
    VALUES (@category, USER_NAME(), GETDATE(), @type_change)
    END
CREATE TRIGGER tr_rewards_delete
ON Rewards AFTER DELETE, UPDATE 
    AS IF UPDATE(category)
    BEGIN
    DECLARE @category   char(2)
    DECLARE @type_change    char(20)

    SELECT @category = (SELECT category FROM deleted)   
    SELECT @type_change = 

    INSERT INTO audit_rewards
    VALUES (@category, USER_NAME(), GETDATE(), @type_change)
    END

删除Microsoft SQL的触发器

2 个答案: