4

我在mysql中创建以下三个表

  1. 邮政局长
  2. 广告
  3. 候选人主

这是创建语句

邮政局长

CREATE TABLE `postmaster` (
  `POSTCODE` int(2) NOT NULL DEFAULT '0',
  `POSTNAME` varchar(250) DEFAULT NULL,
  PRIMARY KEY (`POSTCODE`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

广告

CREATE TABLE `advertisment` (
  `ADVTNO` varchar(35) NOT NULL,
  `ADVTDATE` date NOT NULL,
  `POSTCODE` int(2) NOT NULL,
  `ADVTOPENDATE` date NOT NULL COMMENT 'ADVERTISEMENT OPENING DATE',
  `ADVTCLOSEDATE` date NOT NULL COMMENT 'ADVERTISEMENT CLOSING DATE',
  `EDITCLOSEDATE` date NOT NULL COMMENT 'CLOSING DATE FOR EDITING APPLICATION',
  `LASTREPRINTDATE` date NOT NULL COMMENT 'LAST DATE FOR REPRINTING APPLICATION',
  `FEESCST` int(4) NOT NULL COMMENT 'FEE FOR SC/ST CATEGORY',
  `FEESTAFF` int(4) DEFAULT NULL COMMENT 'FEE FOR STAFF ',
  `FEEOBC` int(4) DEFAULT NULL COMMENT 'FEE FOR OBC CATEGORY',
  `ADVOCATEEXPERIENCE` int(2) DEFAULT NULL,
  PRIMARY KEY (`ADVTNO`,`ADVTDATE`,`POSTCODE`),
  KEY `fk_post` (`POSTCODE`),
  CONSTRAINT `fk_post` FOREIGN KEY (`POSTCODE`) REFERENCES `postmaster` (`POSTCODE`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1

到这里为止的一切都很好，但是当我去创建CANDIDATEMAIN表时，我得到了错误

这是CANDIDATEMAIN的创建语句

CREATE TABLE `candidatemain` (

  `ADVTNO` varchar(35) NOT NULL DEFAULT '',
  `ADVTDATE` date NOT NULL DEFAULT '0000-00-00',
  `POSTCODE` int(2) NOT NULL DEFAULT '0',
  `REGISTRATIONNO` int(6) NOT NULL DEFAULT '0',
  `SALUTATION` varchar(10) NOT NULL,
  `FULLNAME` varchar(90) NOT NULL,
  `SURNAME` varchar(30) DEFAULT NULL,
  `NAME` varchar(30) NOT NULL,
  `LASTNAME` varchar(30) DEFAULT NULL,
  `LASTUPDATEDIP` varchar(20) NOT NULL DEFAULT '',
  `LASTUPDATEDDATE` date DEFAULT NULL,
  `ENTRYDATE` date NOT NULL,
  PRIMARY KEY (`ADVTNO`,`ADVTDATE`,`POSTCODE`,`REGISTRATIONNO`),
  KEY `FK_ADVT` (`ADVTNO`, `ADVTDATE`,`POSTCODE`) ,
  CONSTRAINT `FK_ADVT` FOREIGN KEY (`ADVTNO`, `ADVTDATE`,`POSTCODE`) REFERENCES `advertisment` (`ADVTNO`, `ADVTDATE`,`POSTCODE`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

我得到的错误是：

Error Code: 1005. Can't create table 'dbName.candidatemain' (errno: 150)

此错误的原因可能是什么？

MYSql 版本：mysql Ver 14.14 Distrib 5.1.53，适用于 Win64

4

2 回答 2

7

创建advertisment表，默认字符集为utf8;

latin1列不等同于utf8列。所以外键约束不能正确形成。因此1005 (ER_CANT_CREATE_TABLE)错误。

这是我的mysql日志。

mysql> CREATE TABLE `advertisment` (
    ->   `ADVTNO` varchar(35) NOT NULL,
    ->   `ADVTDATE` date NOT NULL,
    ->   `POSTCODE` int(2) NOT NULL,
    ->   `ADVTOPENDATE` date NOT NULL COMMENT 'ADVERTISEMENT OPENING DATE',
    ->   `ADVTCLOSEDATE` date NOT NULL COMMENT 'ADVERTISEMENT CLOSING DATE',
    ->   `EDITCLOSEDATE` date NOT NULL COMMENT 'CLOSING DATE FOR EDITING APPLICATION',
    ->   `LASTREPRINTDATE` date NOT NULL COMMENT 'LAST DATE FOR REPRINTING APPLICATION',
    ->   `FEESCST` int(4) NOT NULL COMMENT 'FEE FOR SC/ST CATEGORY',
    ->   `FEESTAFF` int(4) DEFAULT NULL COMMENT 'FEE FOR STAFF ',
    ->   `FEEOBC` int(4) DEFAULT NULL COMMENT 'FEE FOR OBC CATEGORY',
    ->   `ADVOCATEEXPERIENCE` int(2) DEFAULT NULL,
    ->   PRIMARY KEY (`ADVTNO`,`ADVTDATE`,`POSTCODE`),
    ->   KEY `fk_post` (`POSTCODE`),
    ->   CONSTRAINT `fk_post` FOREIGN KEY (`POSTCODE`) REFERENCES `postmaster` (`POSTCODE`)
    -> ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- <== This little change make it work.
Query OK, 0 rows affected (0.06 sec)

mysql> CREATE TABLE `candidatemain` (
    ->
    ->   `ADVTNO` varchar(35) NOT NULL DEFAULT '',
    ->   `ADVTDATE` date NOT NULL DEFAULT '0000-00-00',
    ->   `POSTCODE` int(2) NOT NULL DEFAULT '0',
    ->   `REGISTRATIONNO` int(6) NOT NULL DEFAULT '0',
    ->   `SALUTATION` varchar(10) NOT NULL,
    ->   `FULLNAME` varchar(90) NOT NULL,
    ->   `SURNAME` varchar(30) DEFAULT NULL,
    ->   `NAME` varchar(30) NOT NULL,
    ->   `LASTNAME` varchar(30) DEFAULT NULL,
    ->   `LASTUPDATEDIP` varchar(20) NOT NULL DEFAULT '',
    ->   `LASTUPDATEDDATE` date DEFAULT NULL,
    ->   `ENTRYDATE` date NOT NULL,
    ->   PRIMARY KEY (`ADVTNO`,`ADVTDATE`,`POSTCODE`,`REGISTRATIONNO`),
    ->   KEY `FK_ADVT` (`ADVTNO`, `ADVTDATE`,`POSTCODE`) ,
    ->   CONSTRAINT `FK_ADVT` FOREIGN KEY (`ADVTNO`, `ADVTDATE`,`POSTCODE`) REFERENCES `advertisment ` (`ADVTNO`, `ADVTDATE`,`POSTCODE`)
    -> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Query OK, 0 rows affected (0.12 sec)
于 2012-01-25T08:18:07.087 回答
1

您FOREIGN KEY CONSTRAINT的 for 表具有不同的字符集candidatemain，advertisment这会导致错误，让它们具有相同的字符集。

于 2012-01-25T08:25:15.257 回答