Simultaneous DML operations

Question

hi there,
we are doing simultaneous DML operations using trigger, that will be reflected in different tables.the question is insertion and deletion operations are fine and working.but the updation are not happening.
CREATE OR REPLACE TRIGGER TRG_REPLICATION
AFTER INSERT or DELETE or UPDATE
ON emp
FOR EACH ROW
BEGIN
IF (inserting) THEN
insert into dept(employee_id,department_name)VALUES( :new.employee_id,:new.department_name);
insert into promo_details(employee_id,employee_name)VALUES( :new.employee_id,:new.employee_name);
insert into emp_details(employeeid,address)values( :new.employee_id,:new.address);
insert into emp_job(job_id,jobtitle,employee_id)values( :new.job_id,:new.job_title,:new.employee_id);
insert into project(proj_name,employee_id,employee_name)values( :new.proj_name,:new.employee_id,:new.employee_name);
ELSIF (deleting) THEN
delete from dept where employee_id=:old.employee_id or department_name=:old.department_name;
delete from promo_details where employee_id=:old.employee_id or employee_name=:old.employee_name;
delete from emp_details where employeeid=:old.employee_id or address=:old.address;
delete from emp_job where job_id=:old.job_id or jobtitle=:old.job_title or employee_id=:old.employee_id;
delete from project where proj_name=:old.proj_name or employee_id=:old.employee_id or employee_name=:old.employee_name;
ELSIF (updating) THEN
update dept set employee_id=:new.employee_id,department_name=:new.department_name where employee_id=:new.employee_id;
update promo_details set employee_id=:new.employee_id,employee_name=:new.employee_name where employee_id=:new.employee_id;
update emp_details set employeeid=:new.employee_id,address=:new.address where employeeid=:new.employee_id;
update emp_job set job_id=:new.job_id,jobtitle=:new.job_title where employee_id=:new.employee_id;
update project set proj_name=:new.proj_name,employee_id=:new.employee_id,employee_name=:new.employee_name where employee_id=:new.employee_id;
END IF;
END;
update is occuring in one table, where it is written on particular table.but it is not reflecting on other tables.
I want update operation should also be done.
Any good solution will be appreciated.

Answer 1

A bit of error handling is needed if you expect the update to update some rows and if it does not, you want to raise an error.
After each update check SQL%rowcount to check how many rows did the update statement modify and raise an error accordingly.