Query with multiple EXISTS returing too many rows - sql

Question

Original table has 1466303 records in it, I have inserted 1108441 of those records in to a separate table. What I would like to know is what data is left over? So I have made a query using multiple exists to find the data that was left:
SELECT SG_customer,
PHONE,
SG_Name,
SG_Secondary_Address,
SG_Primary_Address,
SG_City,
SG_State,
SG_Zip,
SG_Email
FROM FMJ_DB_VPI_EXPANDED_DATA X
WHERE NOT EXISTS (SELECT 1
FROM FMJScore
WHERE SGID = X.SG_Customer
AND Phone = X.Phone
AND Name = X.SG_Name
AND SecondAddress = X.SG_Secondary_Address
AND Address = X.SG_Primary_Address
AND City = X.SG_City
AND State = X.SG_State
AND Zip = X.SG_Zip
AND Email = X.SG_Email)
Running this returns back 144391 records, there should be a difference of 357862, I don't understand why its returning back so many records.

Answer 1

I assume you want null to be treated equal to null, I also assume that '' is not used as a value, if it is replace it with something that does not normally occur:
SELECT SG_customer,
PHONE,
SG_Name,
SG_Secondary_Address,
SG_Primary_Address,
SG_City,
SG_State,
SG_Zip,
SG_Email
FROM FMJ_DB_VPI_EXPANDED_DATA X
WHERE NOT EXISTS (SELECT 1
FROM FMJScore
WHERE coalesce(SGID,'') = coalesce(X.SG_Customer,'')
AND coalesce(Phone,'') = coalesce(X.Phone,'')
AND coalesce(Name,'') = coalesce(X.SG_Name,'')
AND coalesce(SecondAddress,'') = coalesce(X.SG_Secondary_Address,'')
AND coalesce(Address,'') = coalesce(X.SG_Primary_Address,'')
AND coalesce(City,'') = coalesce(X.SG_City,'')
AND coalesce(State,'') = coalesce(X.SG_State,'')
AND coalesce(Zip,'') = coalesce(X.SG_Zip,'')
AND coalesce(Email,'') = coalesce(X.SG_Email,''))
The optimizer might not be able to use indexes efficiently due to the function call