Oracle if updating trigger dating service in philadelphia
Perhaps the greatest strength or utility of an INSTEAD-OF trigger is its ability to update what would normally appear to be non-updateable views.
But to use a statement level trigger, some data may need to be preserved from each row, to be used by the statement level trigger.
A trigger that causes other database events to execute triggers can cause the database crash.
For example, the database can capture server errors by defining a trigger on the database server error event.
What this means to a trigger is that if the trigger reads a table, it can not change the table that it read from.
This does not impact the exclusive use of : OLD and : NEW.The insert to the child table caused the foreign key to validate the data on the parent (which fired the trigger) causing the insert of the child table to result in a mutating table error on the parent table.