Question

I am trying to create a relation/table in Oracle that is between two many to many tables and therefore the Primary key of this table is a composite key but both keys are foreign.

CREATE TABLE employee_licence_certificate(
    emp_id NUMBER(4) REFERENCES employee(emp_id)
    , licence_cert_code VARCHAR2(6) REFERENCES licence_certificate(licence_cert_code)
    , date_earned DATE NOT NULL
    ) 
PRIMARY KEY (emp_id, licence_cert_code))

I have tried using the method for composition keys but I seem to get the following error, which is starting to make me wonder is this even possible?

Error starting at line 1 in command:
CREATE TABLE employee_licence_certificate(emp_id NUMBER(4) REFERENCES employee(emp_id)
, licence_cert_code VARCHAR2(6) REFERENCES licence_certificate(licence_cert_code)
, date_earned DATE NOT NULL) PRIMARY KEY (emp_id, licence_cert_code))
Error at Command Line:3 Column:29
Error report:
SQL Error: ORA-00922: missing or invalid option
00922. 00000 -  "missing or invalid option"
*Cause:    
*Action:

Answer 1

Try this:

CREATE TABLE employee_licence_certificate(
    emp_id NUMBER(4) REFERENCES employee(emp_id)
  , licence_cert_code VARCHAR2(6) REFERENCES licence_certificate(licence_cert_code)
  , date_earned DATE NOT NULL
  ,
PRIMARY KEY (emp_id, licence_cert_code))