Average Rating Trigger ORACLE SQL - sql

Question

I am trying to create a trigger where is takes a several number of ratings from a table called FEEDBACK, and it creates an Average Rating on the MEMBER table. I want the trigger to update the average rating of each person whenever a new feedback is inserted.
----------- These are my tables -----------
create table Member_T(
MemberID Varchar2 (10) primary key,
MemberFirstName Varchar2 (20) NOT NULL,
MemberLastName Varchar2 (20) NOT NULL,
MemberMidleName Varchar2 (10),
MemberEmail Varchar2 (50) NOT NULL,
MemberPassword Varchar2 (20) NOT NULL,
MemberAdress Varchar2 (50) ,
MemberCity Varchar2 (20) ,
MemberState char (2) ,
MemberCountry Varchar2 (20) ,
MemberZipCode number (5,0),
MemberPhone Varchar2 (12) ,
MemberAverageRating number (3,1) check (MemberAverageRating >= 0.0 AND MemberAverageRating <= 5.0));
create table Feedback_T(
FeedbackID Varchar2 (10) primary key,
FeedbackMemberGiverID Varchar2 (10) references Member_T(MemberID),
MemberReceiverID Varchar2 (10) references Member_T(MemberID),
MemberRating number (3,1) check (MemberRating >= 0.0 AND MemberRating <= 5.0),
MemberComment Varchar2 (500),
MemberFeedbackDate Date Default(sysdate));
----------- This is my trigger -----------
create or replace trigger updateRating
after insert
on Feedback_T
for each row
Declare
rating Feedback_T.MemberRating%type;
receiver Feedback_T.MEMBERRECEIVERID%type;
averageRating Member_T.MemberAverageRating%type;
begin
select AVG(MemberRating), count(MEMBERRECEIVERID)
into rating, receiver
from Feedback_T
where Feedback_T.FEEDBACKID = :new.FEEDBACKID;
update Member_T
set averageRating = rating / receiver
where Member_T.MemberID = :new.MemberID;
end;
----------- I get this error -----------
TRIGGER UPDATERATING compiled
Errors: check compiler log

Answer 1

If you run "show errors" from the sql prompt, you will see your errors, or compile this in SQLDeveloper, which will show you the errors. Your problem is:
where Member_T.MemberID = :new.MemberID;
Where there is no bind variable called :new.MemberID, since MemberID is not a column in the Feedback_T table that the trigger is for. Maybe you meant to reference FeedbackMemberGiverID or MemberReceiverID?