Can we have two before insert trigger for the same table?
Yes, you can definitely have more than one trigger for each operation, e.g. AFTER INSERT or AFTER UPDATE etc. It does make sense to split up separate concerns into separate, small, manageable chunks of code.
What is the FOR EACH IN trigger?
The FOR EACH ROW option determines whether the trigger is a row trigger or a statement trigger. If you specify FOR EACH ROW , then the trigger fires once for each row of the table that is affected by the triggering statement.
Can a trigger update its own table?
Trigger Restrictions Each trigger can apply to only one table. However, a single trigger can apply to all three user actions: update, insert, and delete.
Can a trigger update the same table?
Within a stored function or trigger, it is not permitted to modify a table that is already being used (for reading or writing) by the statement that invoked the function or trigger. According to this answer, it seems that you should: activationCode and email are rows in the table USER .
How do I create a multi table trigger?
create trigger tuweke after insert on product for each row execute procedure tuwekeAdjustextract(); create trigger tuweke after insert on caneweightment for each row execute procedure tuwekeAdjustextract(); …
What is meaning of new and old in trigger?
NEW and OLD are special variables that you can use with PL/SQL triggers without explicitly defining them. NEW is a pseudo-record name that refers to the new table row for insert and update operations in row-level triggers. When a trigger is activated by a DELETE operation, the :NEW. column used in that trigger is null.
Can you have more than one insert trigger?
Yes, you can definitely have more than one trigger for each operation, e.g. AFTER INSERT or AFTER UPDATE etc. It does make sense to split up separate concerns into separate, small, manageable chunks of code.
What is the name of the trigger for delete?
A single trigger per operation (insert/update/delete) that handles multiple concerns (logs, enforces implicit referencial integrity, and executes arbitrary business logic). This trigger could be named D_TableName (“D” for delete). Multiple triggers per operation that were segregated by concern.
How is a chain of triggers determined in Java?
A chain of triggers calling triggers is determined by insert/update/delete statements that do not make the call to the trigger explicit. The problem with triggers is that they introduce dependencies and locking among disparate tables, and it can be a nightmare to disentangle the dependencies.