Can following query be used to find inserted update records.

Question

hi,
i am using query1) to insert data query2) to update the record
query1)
INSERT INTO [t1]
           ( id
            ,createddatetime
           ,updateddatetime)
     VALUES
           (1
           ,GETDATE()
           ,GETDATE()) 
query2)
update t1 set updatedatetime=getdate() where id=@t1
please tel me will two date cols get same time , that is, will i be able to 
write following to find inserted/updated rows
if exists(select * from t1 where createddt1=updateddt2)
begin 
select 'inserted'
end 
else
begin 
select 'updated'
end
yours sincerely

Answer 1

Depending on how you execute both the queries there's a small chance date value comparison may not wok as expected as datetime also has timepart until milliseconds precision. So if you want to retrieve details on records inserted and updated you may use
something like below
query 1
DECLARE @dt datetime
SET @dt = GETDATE()
INSERT INTO [t1]
( id
,createddatetime
,updateddatetime)
VALUES
(1
,@dt
,@dt)
query2
DECLARE @dt datetime
SET @dt = GETDATE()
update t1 set updatedatetime=@dt where id=@t1
then you can do below to get inserted updated detailsif exists(select * from t1 where createddt1=updateddt2)begin select 'inserted'end elsebegin select 'updated'end
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