Can you have a table with just a foreign key?

How do you create a table with only a foreign key?

To create a new table containing a foreign key column that references another table, use the keyword FOREIGN KEY REFERENCES at the end of the definition of that column. Follow that with the name of the referenced table and the name of the referenced column in parentheses.

Can a table only have foreign key without primary key?

Yes, you can make one without a Primary Key (or, another option is a Compound Primary Key - making the two references a unique pair, and using that as the unique identifying key - but even this isn't necessary (note: just because it "isn't necessary" doesn't mean it isn't "good practice"; it wouldn't generally be a ...

Is it okay to have a table without primary key?

Every table can have (but does not have to have) a primary key. The column or columns defined as the primary key ensure uniqueness in the table; no two rows can have the same key. The primary key of one table may also help to identify records in other tables, and be part of the second table's primary key.

Can you have a foreign key without a constraint?

Foreign Keys without the constraints You don't have to configure a foreign key constraint on a column just because it refers to another column. You could instead configure two tables such that one refers to the other, but without any defined foreign key.