Oracle触发器-新插入记录的更新列

Question

In My Oracle (Express) DB I have a table with a column, named created (date type).
What I am trying to do, is to create a trigger that will update that column after an update or insert, was done, with SYSDATE .

My sql (for insert only, I know, it fails anyway) is:

CREATE OR REPLACE TRIGGER  "VIRTUAL_COUNTERS_NEW" 
AFTER
insert on "VIRTUAL_COUNTERS"
begin
new.updated := SYSDATE
end;
/
ALTER TRIGGER  "VIRTUAL_COUNTERS_NEW" ENABLE
/

Answer 1

You need to prefix new with a colon character and add for each row so that the update is for each row in case of multiple rows insert:

CREATE OR REPLACE TRIGGER  VIRTUAL_COUNTERS_NEW
BEFORE
insert on VIRTUAL_COUNTERS
FOR EACH ROW
begin
  :new.updated := SYSDATE;
end;
/