Update trigger based on dates

Question

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i want update status based on dates for that one

Example

SQL

create trigger emp_trigger on emp
after insert
as
begin
declare @todate date
declare @fromdate Date
declare @dt Date
Set @todate='2011-12-01'
set @fromdate='2011-12-06'
set @dt='2011-12-08'
if @dt not between  @todate and @fromdate
begin
update emp set status='expire' where empid=1
end
End

I am writting this trigger, but i am not able to update this check it

Posted 8-Dec-11 19:21pm

shivanibyreddy

Updated 8-Dec-11 19:34pm

Karthik Harve

v3

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Al Moje 9-Dec-11 1:33am

Replace 'aable' with 'not able'

Karthik Harve 9-Dec-11 1:34am

Added pre tags.

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Valery Possoz · Answer 1 · 2011-12-10T07:25:00

Hello

This trigger is a bit weird as it will only ever update one row where empid=1! so if the row does not exist it will do nothing.

If you want to update the row you are currently inserting you should remove the where clause from the trigger statement.

SQL

create trigger emp_trigger 
on emp
after insert
as
begin
    declare @todate date
    declare @fromdate Date
    declare @dt Date
    Set @todate='2011-12-01'
    set @fromdate='2011-12-06'
    set @dt='2011-12-08'
    if @dt not between  @todate and @fromdate
    begin
        update emp set status='expire' 
    end
End

Valery.

Amir Mahfoozi · Answer 2 · 2011-12-10T19:56:00

In your trigger you only updated the row with ID of 1 ! So what about other conditions ?

You can access inserted or deleted rows from the inserted and deleted tables.
So have look at here :
http://msdn.microsoft.com/en-us/library/aa214435%28v=sql.80%29.aspx[^]

Another thing is that you don't want constant dates in your trigger, if so it's not necessary to have a trigger !

So your trigger can be like this :

SQL

create trigger emp_trigger on emp
after insert
as
begin
declare @todate date
declare @fromdate Date
declare @dt Date
Set @todate='2011-12-01'
set @fromdate='2011-12-06'


update emp set status= 'expired'      where Id in (select ID from inserted i where not i.dt between @fromdate and @todate )
update emp set status= 'not expired'  where Id in (select ID from inserted i where     i.dt between @fromdate and @todate )	

End

In this trigger its assumed that there is a dt field in your emp table and it decides on that field that what should be in status field.

Hope it helps.

Update trigger based on dates

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