Trigger updating same row
My table contains the following columns: ID, Parent, URL, Name, SAME AFTER UPDATE, I want my trigger to SET the I am able to create the trigger, but when it run I get an error: Can't update table 'Table2' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.
Googling it I found suggestions that simply eliminate the UPDATE ( which would make sense) ) is used..
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Tom, Most of the times it appear that either before or after row trigger can be used to serve the purpose in real world applications.
One Question "since someone can come along next year, add a new BEFORE FOR EACH ROW trigger" I would add any new Trigger logic to the existing BEFORE Trigger.
I need to create a SQL Server trigger that will execute when a column value is updated to a specific value. In this tip, we show you how to write T-SQL statements that will create a SQL Server trigger that will execute after we update a column value to a specific value.
but I cannot imagine any possible reason why this would mean "anything"? suggestion: put all SQL you think about putting into triggers in a packaged procedure and call that procedure from the trigger -- better caching of SQL that way. This way the history table is complete , I dont need to query the parent table for the latest record. July 01, 2005 - pm UTC it should be an after trigger, since someone can come along next year, add a new BEFORE FOR EACH ROW trigger that fires after (or before, you cannot control this) your BEFORE FOR EACH ROW trigger and changes the :new values -- making the ones you recorded "wrong" Thanx Understood your point.
It is very important to include the INNER JOIN to the INSERTED table so that only the updated rows are affected.
Using the clause WHERE Order Status='Approved' by itself to limit the rows updated will actually result in all rows with an Order Status value of Approved being updated at the same time.
It might be better include the logic in the trigger itself." id="ctl00_m_m_i_ctl00_gr_ctl01_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="1455169" / The procedure is an autonomous transaction.
create or replace trigger Trig On Test1 BEFORE -- before instead of after insert or update on mytest1 referencing OLD as old NEW as new for each row begin if :new.col1 = 100 then :new.col3 := 500; -- set value here end if; end;" id="ctl00_m_m_i_ctl00_gr_ctl03_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="1455172" / you should do this: create or replace trigger Trig On Test1 BEFORE -- before instead of after insert or update on mytest1 referencing OLD as old NEW as new for each row begin if :new.col1 = 100 then :new.col3 := 500; -- set value here end if; end; it would be much easier to do it all in a single trigger.
In the image below we see where we create our example table named tbl Trigger Test with a primary key column named pk ID, a date column named Order Approval Date Time and a varchar column named Order Status.