Update happens in trigger

Question

Hi
If the update happens on the (suppose emp table ) first time of the day
(first time of every day)
insert the records into emp_tar table
if it is second time need to update
Pls let me know.
Regards,

Answer 1

Hi
I am getting the error while updating (featch returns more than one row) in the trigger.
so i impliment cursor.
pls sugget the way is right
CREATE OR REPLACE TRIGGER tri_name
AFTER INSERT OR UPDATE
ON emp_dept REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
DECLARE
v_emp_dept_hist NUMBER(5);
v_Day_DIM_FROM_ID date;
cursor c1 is SELECT Day_DIM_FROM_ID FROM emp_dept;
BEGIN
IF INSERTING THEN
INSERT INTO emp_dept
VALUES (:NEW.EMP_NO,:NEW.DEPT_NO,to_date('1/1/1900','MM/DD/YYYY'),to_date('12/31/9999','MM/DD/YYYY'),SYSDATE);
ELSIF
open c1;
loop
fetch c1 into v_Day_DIM_FROM_ID;
EXIT when C1%NOTFOUND;
v_Day_DIM_FROM_ID = to_date('1/1/1900','MM/DD/YYYY') THEN
Update emp_dept --here i am getting the error so i use cursor
Set
Day_DIM_TO_ID = trunc(sysdate) - 1;
INSERT INTO emp_dept
VALUES (:NEW.EMP_NO,:NEW.DEPT_NO,sysdate,to_date('12/31/9999','MM/DD/YYYY'),SYSDATE);
end loop; -- can i use end loop here
else
INSERT INTO emp_dept VALUES (:NEW.EMP_NO,:NEW.DEPT_NO,SYSDATE,to_date('12/31/9999','MM/DD/YYYY'),SYSDATE);
END IF;
Thanks in advance
END;