Triggers can be: Trigger names must be unique with respect to other triggers in the same schema.
Trigger names do not need to be unique with respect to other schema objects, such as tables, views, and procedures.
(If I got this wrong and your question is indeed about Oracle database, please edit your question to remove the My SQL tag and put the Oracle tag back in.)The idea of trigger is not to do an additional update of the table but to adjust the values so that we do additional things with one UPDATE. Do you really need to increment C2 column of all rows when C1 of one row becomes 0?
I am trying to implement a type 2 slowly changing dimension in a PG data warehouse using a trigger function.
It does not "see" the new record because the record has not been committed so the update comes back with 0 rows updated.
It might be better include the logic in the trigger itself.
Once the trigger is created, entering the following SQL statement: A trigger is either a stored PL/SQL block or a PL/SQL, C, or Java procedure associated with a table, view, schema, or the database itself.
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.
As @ypercubeᵀᴹ pointed out in the comments, How do I add a “last updated” column in a SQL Server 2008 R2 table? Checking to see if the column has been updated just skips the logic and works the way I expect it to. Last Updated = GETDATE() 90 FROM Contact ct WHERE ...
For some reason I thought it would stop the update entirely but that's obviously not the case. Last Updated = '1900-04-01` FROM Contact ct WHERE ... Edit: I've just noticed that a1ex07 has posted essentially the same answer.
The problem that I ran into with that was that the temporary table was containing previous updates that had been processed already and the database was getting stuck in a loop.
It looks like what you want to do is actually have a summary of the sum of used bytes in each folder, right?