Error: 1075

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  bowens Posts: 1 New member

  April 21, 2018 12:54PM

  MySQL is returning that error because there is no unique index defined on the idcolumn. (MySQL requires that there be a unique index. The other possibility, which you would have already figured out, is that there can be only one column defined as AUTO_INCREMENT within the table.) 
  See more: https://www.repairtoolbox.com/mysqlrepair.html

  
  

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  LenaFischmann Posts: 3 New member

  August 16, 2019 2:12AM

  MySQL is returning that error (most likely) because there is no unique index defined on the idcolumn. (MySQL requires that there be a unique index. The other possibility, which you would have already figured out, is that there can be only one column defined as AUTO_INCREMENT within the table.)

  To get that column to be an AUTO_INCREMENT, you can add either a UNIQUE constraint or a PRIMARY KEY constraint on the id column. For example:

  ALTER TABLE `blog` ADD CONSTRAINT `blog_ux` UNIQUE (`id`) ;

  (Note that this statement will return an error if any duplicate values exist for the id column.)

  Alternatively, you can make the id column the PRIMARY KEY of the table (if the table doesn't already have a PRIMARY KEY constraint defined).

  ALTER TABLE `blog` ADD PRIMARY KEY (`id`) ;

  (Note that this statement will return an error if any duplicate value exist for the id column, OR if there are any NULL values stored in that column, of if there is already a PRIMARY KEY constraint defined on the table.)

  If it still doesn't work,try this: https://docsbay.net/mysql-php-newbie

  Or try this: CREATE TABLE `testing` (

  
    `id` INT NOT NULL AUTO_INCREMENT, 
    `date` DATE NOT NULL, 
    `text_1` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, 
    `text_2` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
    PRIMARY KEY (`id`)
  ) ENGINE = MYISAM <span>;
  </span>

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