1062 MySQL的 - 无法找到原因

#1062 - Duplicate entry '127' for key 'PRIMARY'

，并不能找到原因。

查询：

INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('00'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('01'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('02'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('03'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('04'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('05'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('06'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('07'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('08'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('09'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('0A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('0B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('0C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('0D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('0E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('0F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('10'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('11'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('12'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('13'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('14'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('15'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('16'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('17'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('18'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('19'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('1A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('1B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('1C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('1D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('1E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('1F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('20'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('21'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('22'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('23'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('24'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('25'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('26'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('27'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('28'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('29'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('2A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('2B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('2C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('2D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('2E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('2F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('30'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('31'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('32'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('33'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('34'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('35'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('36'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('37'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('38'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('39'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('3A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('3B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('3C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('3D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('3E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('3F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('40'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('41'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('42'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('43'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('44'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('45'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('46'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('47'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('48'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('49'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('4A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('4B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('4C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('4D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('4E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('4F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('50'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('51'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('52'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('53'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('54'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('55'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('56'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('57'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('58'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('59'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('5A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('5B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('5C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('5D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('5E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('5F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('60'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('61'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('62'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('63'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('64'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('65'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('66'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('67'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('68'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('69'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('6A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('6B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('6C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('6D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('6E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('6F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('70'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('71'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('72'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('73'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('74'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('75'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('76'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('77'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('78'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('79'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('7A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('7B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('7C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('7D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('7E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('7F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('80'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('81'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('82'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('83'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('84'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('85'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('86'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('87'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('88'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('89'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('8A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('8B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('8C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('8D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('8E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('8F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('90'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('91'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('92'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('93'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('94'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('95'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('96'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('97'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('98'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('99'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('9A'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('9B'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('9C'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('9D'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('9E'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('9F'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A0'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A1'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A2'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A3'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A4'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A5'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A6'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A7'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A8'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('A9'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('AA'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('AB'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('AC'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('AD'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('AE'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('AF'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B0'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B1'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B2'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B3'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B4'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B5'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B6'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B7'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B8'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('B9'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('BA'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('BB'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('BC'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('BD'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('BE'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('BF'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C0'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C1'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C2'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C3'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C4'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C5'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C6'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C7'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C8'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('C9'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('CA'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('CB'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('CC'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('CD'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('CE'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('CF'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D0'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D1'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D2'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D3'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D4'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D5'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D6'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D7'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D8'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('D9'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('DA'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('DB'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('DC'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('DD'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('DE'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('DF'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E0'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E1'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E2'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E3'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E4'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E5'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E6'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E7'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E8'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('E9'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('EA'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('EB'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('EC'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('ED'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('EE'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('EF'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F0'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F1'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F2'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F3'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F4'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F5'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F6'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F7'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F8'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('F9'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('FA'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('FB'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('FC'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('FD'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('FE'); 
INSERT INTO `portautomadb`.`tag` (`codigo`) VALUES ('FF');

表的结构：

CREATE TABLE `tag` (  
    `idtag` tinyint(4) NOT NULL AUTO_INCREMENT,   
    `codigo` varchar(3) NOT NULL,   
    PRIMARY KEY (`idtag`),   
    UNIQUE KEY `codigo_UNIQUE` (`codigo`) 
) ENGINE=InnoDB AUTO_INCREMENT=127 DEFAULT CHARSET=utf8

需要帮助谢谢。

来源

2013-03-06 user2132046

signed TINYINT可以包含数字frmo -128至127.您的表中最有可能已经有127行，因此您的主键列不能包含更多。改变你的数据类型做SMALLINT UNSIGNED（0-65535）MEDIUMINT UNSIGNED（0-16777215）或只是INT UNSIGNED（0-4294967295） - 这lasst应该是绰绰有余

来源

2013-03-06 15:27:25 Mchl

实际上比尔的准确性更高 – Mchl 2013-03-06 15:31:07

+1对你也是@Mchi--在我发布我之前，你发布了你的几秒钟。仅供参考，MySQL开发人员告诉我，在内部，无论如何MEDIUMINT存储总是舍入到4个字节，所以除非您真的想限制列的范围，否则没有优势使用它。 – 2013-03-06 15:32:41

@Mchl我认为两者都是准确的:) – Kermit 2013-03-06 15:34:15

你的主键是TINYINT（符号的8位整数），它最多只能取值127.如果试图插入第128行，新的自动增量值将被截断为127，并且失败，因为已经有一行具有该值。

改变你的表来更改IDTAG的数据类型为INT：因为根据定义

mysql> alter table tag modify column idtag int auto_increment;

而改变一列是一个非常大的表昂贵的操作，它应该是非常快的在这种情况下，你的桌子最多有127行。

来源

2013-03-06 15:27:55

首先看到Mchl的回答; +1以及。 – Kermit 2013-03-06 15:33:46

您已达到TINYINT数据类型的最大值，它可以从-128到127保持不变。改为将其更改为INT。

来源

2013-03-06 15:28:11

1062 MySQL的 - 无法找到原因

回答

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