Composite primary key as foreign key MySQL

Question

I have a table

TABLE PARTECIPATION
(PARTY_ID INT,
GUEST ...
PRIMARY KEY(PARTY_ID, GUEST)
FOREIGN KEY(PARTY_ID) REFERENCES PARTY(ID)
FOREIGN KEY(GUEST) REFERENCES GUEST(GUEST)
)

And a table of guests

TABLE GUEST
(NAME VARCHAR(20),
SURNAME VARCHAR(20),
AGE INT,

PRIMARY KEY(NAME, SURNAME)
)

Now, how can I set the GUEST element of PARTECIPATION as FOREIGN KEY REFERENCES to GUEST TABLE?

Should I create a column into GUEST named, idk, ID and set this one as primary key? Or can I do something like this:

TABLE PARTECIPATION
(PARTY_ID INT,
GUEST_NAME VARCHAR(20),
GUEST_SURNAME VARCHAR(20)
PRIMARY KEY(PARTY_ID, GUEST_NAME, GUEST_SURNAME)
FOREIGN KEY(PARTY_ID) REFERENCES PARTY(ID),
FOREIGN KEY(GUEST_NAME) REFERENCES GUEST(NAME),
FOREIGN KEY(GUEST_SURNAME) REFERENCES GUEST(SURNAME))

Answer 1

A foreign key must have the same number of columns, in the same order, as the primary key it references. This means you must put multiple columns into one foreign key definition, if the PK has multiple columns.

TABLE PARTECIPATION
(PARTY_ID INT,
GUEST_NAME VARCHAR(20),
GUEST_SURNAME VARCHAR(20)
PRIMARY KEY(PARTY_ID, GUEST_NAME, GUEST_SURNAME)
FOREIGN KEY(PARTY_ID) REFERENCES PARTY(ID),
FOREIGN KEY(GUEST_NAME, GUEST_SURNAME) REFERENCES GUEST(NAME, SURNAME))