Q: Foreign Key reference not populating in intended table I'm having a problem referencing a Foreign Key from another table that has already been created with data imported. 
ALTER TABLE CSEA_BOOK
ADD CONSTRAINT FK_BOOK_CASE_ID FOREIGN KEY (CASE_ID)
    REFERENCES CSEA_CASE(CASE_ID);

I can create it just fine but when you
SELECT *
FROM CSEA_CASE a, CSEA_BOOK b
WHERE a.CASE_ID = b.CASE_ID;
everything comes back NULL where I know it should contain data.
Am I doing something out of order or Sequence?
