Question

现在触发器看起来像这样，部分工作

我的触发器看起来像这样

   ALTER  trigger [dbo].[tr_EligebilityCheck]
on [dbo].[Clients]
 for INSERT,update
as 

BEGIN
UPDATE Clients 
SET 
StatusID = 5
WHERE 
ClientID IN (Select ClientID
            from Clients c 
            join inserted --ADD THIS JOIN
            on inserted.ClientID = c.ClientID
            join IncomeEligibility i 
            on c.HshldSize = i.HshldSize
            where StatusID in (1,2) 
            and  WIC = 0
            and (c.CategCode = 'SR' 
                and ((MonthlyYearly = 'month' and c.AnnualHshldIncome >= i.SeniorMo) 
                or (c.AnnualHshldIncome >= i.SeniorYr and MonthlyYearly ='year'))
                and DATEDIFF(YEAR,DOB,GETDATE()) < 60)
            or
                (c.CategCode = 'CH' 
                and ((MonthlyYearly = 'month' and c.AnnualHshldIncome >= i.WomanChildMo) 
    or (c.AnnualHshldIncome >= i.WomanChildYr and MonthlyYearly ='year'))
                and DATEDIFF(YEAR,DOB,GETDATE()) > 6))

update Clients
set StatusID = 4 
where WIC =1
from Clients --ADD THIS FROM STATEMENT
join inserted --ADD THIS JOIN
on inserted.ClientID = Clients.ClientID

END

当我使用CategCode ='SR'插入客户端时，如果客户端小于60，则仅检查DOB并触发，但如果客户端较旧，则不检查此

and ((MonthlyYearly = 'month' and c.AnnualHshldIncome >= i.SeniorMo) 
                    or (c.AnnualHshldIncome >= i.SeniorYr and MonthlyYearly ='year'))

如果我使用CategCode ='CH'插入客户端，则检查收入但未检查DOB。

Answer 1

只要您对主键有正确的引用，我就不明白为什么您需要INSTEAD OF触发器。似乎没有任何情况可以防止插入或更新，对吗？您只想确定StatusID的值。在更新之前没有理由要做。

我相信你更新了太多行的原因是你没有将触发器限制在inserted表中的那些行。尝试在触发器中添加联接，如下所示：

ALTER  trigger [dbo].[tr_EligebilityCheck]
on [dbo].[Clients]
 for INSERT,update
as 

BEGIN
UPDATE Clients 
SET 
StatusID = 5
WHERE 
ClientID IN (Select ClientID
            from Clients c 
            join inserted --ADD THIS JOIN
            on inserted.ClientID = c.ClientID
            join IncomeEligibility i 
            on c.HshldSize = i.HshldSize
            where StatusID in (1,2) 
            and  WIC = 0
            and (c.CategCode = 'SR' 
                and ((MonthlyYearly = 'month' and c.AnnualHshldIncome >= i.SeniorMo) 
                or (c.AnnualHshldIncome >= i.SeniorYr and MonthlyYearly ='year'))
                and DATEDIFF(YEAR,DOB,GETDATE()) < 60)
            or
                (c.CategCode = 'CH' 
                and ((MonthlyYearly = 'month' and c.AnnualHshldIncome >= i.WomanChildMo) 
    or (c.AnnualHshldIncome >= i.WomanChildYr and MonthlyYearly ='year'))
                and DATEDIFF(YEAR,DOB,GETDATE()) > 6))

update Clients
set StatusID = 4 
where WIC =1
from Clients --ADD THIS FROM STATEMENT
join inserted --ADD THIS JOIN
on inserted.ClientID = Clients.ClientID

END

如果您确实想要使用INSTEAD OF触发器，请注意以下几点：INSTEAD OF 不与BEFORE UPDATE相同。 BEFORE UPDATE更改inserted表，然后继续更新。 INSTEAD OF完全取消插入或更新，这意味着您需要明确地重写它。我有一个例子如下。

此外，如果您想使用INSTEAD OF触发器，则需要单独的INSERT和UPDATE触发器，或者您需要将查询编写为{{ 1}}陈述。我将在下面的示例中使用MERGE：

INSERT

SQL Server触发更新数据到表中，但只有在客户插入或更新一个客户端时才应更新数据

1 个答案: