Answers for "when we use trigger in sql"

how to set up a trigger in sql

Create Trigger Product_Details_tr
on Product_Details
for Insert
as
being
insert into Product_Details_Audit_Log(audit_ID, update_time_stamp)
select Id, CURRENT_TIMESTAMP
from inserted 
end

CREATE trigger SQL

-- Oracle DB Syntax
CREATE OR REPLACE TRIGGER {trigger_name} 
BEFORE | AFTER 
INSERT | UPDATE | DELETE 
ON {table_name}
(FOR EACH ROW) 
{operation to be executed}

-- for example
CREATE TRIGGER log_updates 
AFTER INSERT OR UPDATE ON Person
FOR EACH ROW 
INSERT INTO LogPerson(ts, IdPerson, surname)
VALUES(CURRENT_TIMESTAMP, NEW.id, NEW.surname);