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Asked: 2026-05-22T17:24:05+00:00

I have multiple (composite) primary keys on a table and one of them will

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I have multiple (composite) primary keys on a table and one of them will be auto increment. However, interestingly SQLite allows usage of AUTOINCREMENT keyword just after an obligatory PRIMARY KEY keyword.

My query is:

CREATE TABLE ticket (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     seat TEXT, payment INTEGER,
     PRIMARY KEY (id, seat))

However the error is table "ticket" has more than one primary key.

Actually I can avoid other primary keys for this table. But I am coding an ORM framework (hell yeah I’m crazy) and do not want to change structure of PRIMARY KEY constraint generation for a table (because it is allowed in MySQL afaik).

Any solutions to this?

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1 Answer

  1. Editorial Team

    No, I don’t think this is possible.

    You can create a UNIQUE INDEX which has essentially the same effect as a PRIMARY KEY:

    CREATE UNIQUE INDEX pk_index ON "table1"("field1","field2");

    Besides, I fail to see the logic of your schema, that is -> if a column is autoincrement and you don’t intend to mess with the values manually, it’s going to be unique anyway, so it makes a good simple short primary key. Why the composite? You may have good reasons to make another index on the combination of columns, though.

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