Can the same column have primary key & foreign key constraint to another column

Question

Can the same column have primary key & foreign key constraint to another column?

Table1: ID - Primary column, foreign key constraint for Table2 ID
Table2         


        

Answer 1

Yes, it can.

No, it won't.

P.S. But you'll not be able to delete table2 data without deleting corresponding table1 rows obviously.

P.P.S. I've implemented such structure in Postgres, but it must be similar for MySQL.