[英]SQL Update Only when Max Date reached
I've two tables like:我有两张桌子,例如:
Table1表格1
-----------------------------------------
TID1 Name Status LastStatus
-----------------------------------------
1 A 1 3
Table2表2
-----------------------------------------
TID2 TID1 oDate Status
-----------------------------------------
1 1 2020-04-01 1
2 1 2020-04-03 2
3 1 2020-04-05 3
The scenario is: If I update the Table2
on TID2 = 2
, the LastStatus
on Table1
shouldn't be updated because there's a MAX Date on Table2
with TID1=1
.场景是:如果我在
TID2 = 2
上更新Table2
,则不应更新Table1
上的LastStatus
,因为Table2
上有一个TID1=1
的 MAX Date 。 So LastStatus
on Table1
will only updated if there's an update on Table2
with MAX Date.因此,表 1 上的
LastStatus
只会在Table1
Table2
上的更新为 MAX 日期时才会更新。
Currently, I only work on Table2
.目前,我只在
Table2
上工作。 It doesn't effect to Table1
.它对
Table1
没有影响。 Below are my code:以下是我的代码:
-- Insert Statement
Declare @TID1 int, @oDate DateTime, @Status int;
Set @TID1 = 1;
Set @oDate = '2020-04-05';
Set @Status = 3;
Insert into Table2 (TID1, oDate, Status) values (@TID1, @oDate, @Status)
-- Update Statement (Example only - if there's a row to be updated)
Update Table2 Set TID1=@TID1, oDate=@oDate, Status=@Status
where TID2 = 3
Does anyone know how to solve this?有谁知道如何解决这个问题?
Ideally you would combine the inserts/updates to both tables in a stored procedure where you would do something like the following:理想情况下,您将在存储过程中将两个表的插入/更新结合起来,您可以在其中执行以下操作:
-- Insert into Table2
insert into dbo.Table2 (TIDI1, oDate, [Status])
select @TIDI1, @oDate, @Status;
-- OR
-- Update Table2
update dbo.Table2 set
TID1 = @TIDI1
, oDate = @oDate
, [Status] = @Status
where TID2 = @TID2;
-- Then update table1 if the date we just added is the latest or more recent
update dbo.Table1 set
LastStatus = @Status
where TID1 = @TIDI1
and @oDate >= (select max(oDate) from dbo.Table2 T2 where T2.TID1 = @TID1);
if @@rowcount = 0 print 'Do nothing';
Well, I found my answer.. Thank you so much for answering my question.好吧,我找到了答案。非常感谢您回答我的问题。
update ActivityPlanHistory
set ActivityPlanId = ActivityPlanId, UpdateDate = @UpdateDate,
StatusId = @StatusId, Remarks = @Remarks
where ActivityPlanHistoryId = @ActivityPlanHistoryId;
if (select max(UpdateDate) from ActivityPlanHistory where ActivityPlanId = @ActivityPlanId) <= @UpdateDate
begin
update ActivityPlan
set LastStatus = @StatusId, LastUpdateDate = @UpdateDate,
LastRemarks = @Remarks
where ActivityPlanId = @ActivityPlanId
end
else
begin
print 'do nothing';
end
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