title: "ORA-02270: no matching unique or primary key for this column-list " how to fix this?
body: <pre><code>CREATE TABLE employee  
  (  
  Boundry_number INT  , 
  emp_ID INT , 
  eName VARCHAR2(30) ,  
  Nationality VARCHAR2(30), 
  PRIMARY KEY (Boundry_number, emp_ID), 
  FOREIGN KEY (Boundry_number) REFERENCES Efada (Boundry_number))
  
  
  
  
  CREATE TABLE Efada (  
  Sponser_number INT,  
  Type_residence VARCHAR2(30),  
  Boundry_number INT, 
  PRIMARY KEY (Boundry_number))
  </code></pre>