Setting

• Postgres 13
• DBeaver

Problem

I think PK can have only one. I know PK can use more than one column.

But it also only one constraint. So it’s one, right?

But today I saw two primary keys at constraints tab when use DBeaver (common db dashboard tool).

So I wonder about PK. Why can I have more than one PK? Is my knowledge wrong?

already have primary key but can make primary key

can see two primary keys