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Home/ Questions/Simple way to fix this error ''incorrect table definition; there can be only one auto column and it must be defined as a key''?
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pete
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pete
Asked: July 9, 20222022-07-09T02:57:01+00:00 2022-07-09T02:57:01+00:00In: Error

Simple way to fix this error ”incorrect table definition; there can be only one auto column and it must be defined as a key”?

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While I’m running my program, I get this error ”incorrect table definition; there can be only one auto column and it must be defined as a key” 

CREATE TABLE book (
    id INT AUTO_INCREMENT NOT NULL,
    accepted_terms BIT(1) NOT NULL,
    accepted_privacy BIT(1) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

I don’t have any experience with the ”incorrect table definition; there can be only one auto column and it must be defined as a key”. In this case, how should I change?

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    hdtutoria Expert
    2022-07-09T02:59:47+00:00Added an answer on July 9, 2022 at 2:59 am

    The cause: This error occurs because you didn’t set a primary key. 

    Solution: Adding the primary key to the AUTO_INCREMENT field to fix this error:

    CREATE TABLE book (
        id INT AUTO_INCREMENT primary key NOT NULL,
        accepted_terms BIT(1) NOT NULL,
        accepted_privacy BIT(1) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
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