Trying to automatically add a new row w/o mutating table error...

Question

I'm using Oracle 10g express. I'm trying to automatically add a new row with the same e_ID, (RDD + 6 months) as the updated row when RC is updated. I'm fairly new to Oracle, so I need some help on creating a trigger. If you need more details let me know. Thanks in advance.
create table E
e_id number(6,0) not null,
constraint e_pk primary key(e_id)
create Table ER
e_Id Number(6,0) Not Null,
SC Date,
RDD Date,
RC Date,
Constraint ER_Fk Foreign Key(E_Id) References E(E_Id)
);

Answer 1

mookjais wrote:
I'm using Oracle 10g express. I'm trying to automatically add a new row with the same e_ID, (RDD + 6 months) as the updated row when RC is updated. I'm fairly new to Oracle, so I need some help on creating a trigger. If you need more details let me know. Thanks in advance.
create table E
e_id number(6,0) not null,
constraint e_pk primary key(e_id)
create Table ER
e_Id Number(6,0) Not Null,
SC Date,
RDD Date,
RC Date,
Constraint ER_Fk Foreign Key(E_Id) References E(E_Id)
);Do you mean following(example)?
create trigger after_insert_e
after
  insert
on  e /*This is table name*/
referencing new as new old as old
for each row
begin
insert into  ER(e_Id,SC,rdd,rc)
values(:new.ed_id,sysdate,sysdate,sysdate);
end;