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Home/ Questions/Q 7743711
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Editorial Team
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Editorial Team
Asked: June 1, 20262026-06-01T09:36:17+00:00 2026-06-01T09:36:17+00:00

I have this table: CREATE TABLE IF NOT EXISTS `produtos` ( `id` int(11) NOT

  • 0

I have this table:

CREATE TABLE IF NOT EXISTS `produtos` (
  `id` int(11) NOT NULL auto_increment,
  `idcatprodutos` int(11) NOT NULL,
  `idcategoria` int(11) NOT NULL,
  `idmarca` int(11) NOT NULL,
  `nome` varchar(100) NOT NULL,
  PRIMARY KEY  (`id`),
  KEY `FK_produtos_2` (`idcatprodutos`),
  KEY `FK_produtos_3` (`idmarca`),
  KEY `FK_produtos_4` (`idcategoria`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC AUTO_INCREMENT=39 ;

and this table:

CREATE TABLE IF NOT EXISTS `sugestoes` (
  `id` int(11) NOT NULL auto_increment,
  `idproduto` int(11) NOT NULL,
  `idsugestao1` int(11) NOT NULL,
  `idsugestao2` int(11) NOT NULL,
  `idsugestao3` int(11) NOT NULL,
  `idsugestao4` int(11) NOT NULL,
  PRIMARY KEY  (`id`),
  KEY `FK_sugestoes_prod` (`idproduto`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 ROW_FORMAT=FIXED AUTO_INCREMENT=9 ;

I already have created a fk sugestoes.idproduto -> produtos.id working, but I want each of the other fields also refer to the produtos.id through new FK.
Run this command below that return MySQL Error : #1005 – Can’t create table (errno: 150):

ALTER TABLE `infantile`.`sugestoes` ADD CONSTRAINT `FK_sugestoes_2` FOREIGN KEY `FK_sugestoes_2` (`idsugestao1`)
    REFERENCES `produtos` (`id`)
    ON DELETE SET NULL
    ON UPDATE CASCADE
, ROW_FORMAT = FIXED;

Does anyone have any idea what’s going on?

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-06-01T09:36:19+00:00Added an answer on June 1, 2026 at 9:36 am

    Try this,

    it works:

    ALTER TABLE `sugestoes`
    ADD CONSTRAINT `FK_idproduto_produtos_1` FOREIGN KEY (`idproduto`) REFERENCES `produtos` (`id`),
    ADD CONSTRAINT `FK_sugestoes_produtos_2` FOREIGN KEY (`idsugestao1`) REFERENCES `produtos` (`id`),
    ADD CONSTRAINT `FK_sugestoes_produtos_3` FOREIGN KEY (`idsugestao2`) REFERENCES `produtos` (`id`),
    ADD CONSTRAINT `FK_sugestoes_produtos_4` FOREIGN KEY (`idsugestao3`) REFERENCES `produtos` (`id`),  
    ADD CONSTRAINT `FK_sugestoes_produtos_5` FOREIGN KEY (`idsugestao4`) REFERENCES `produtos` (`id`)
    

    UPDATE:

    You can not specify

    ON DELETE SET NULL
    

    Because of this:

    You have defined a SET NULL condition though some of the
    columns are defined as NOT NULL

    You can see exact error when you run

    SHOW ENGINE INNODB STATUS;
    
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