我的代码:
CREATE TABLE IF NOT EXISTS `friends` (
`Id` INT(10) NOT NULL AUTO_INCREMENT,
`providerid` INT(10) NOT NULL AUTO_INCREMENT,
`requestid` INT(10) NOT NULL AUTO_INCREMENT,
`status` BINARY(1) NOT NULL,
PRIMARY KEY (`Id`)
);
CREATE TABLE IF NOT EXISTS `messages` (
`Id` INT(255) NOT NULL AUTO_INCREMENT,
`fromuid` INT(255) NOT NULL,
`touid` INT(255) NOT NULL,
`sentdt` DATETIME NOT NULL,
`read` TINYINT(1) NOT NULL DEFAULT '0',
`readdt` DATETIME DEFAULT NULL,
`messagetext` LONGTEXT CHARACTER SET utf8 NOT NULL,
PRIMARY KEY (`Id`)
);
CREATE TABLE IF NOT EXISTS `users` (
`Id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
`username` VARCHAR(45) NOT NULL DEFAULT '',
`password` VARCHAR(32) NOT NULL DEFAULT '',
`email` VARCHAR(45) NOT NULL DEFAULT '',
`date` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
`status` TINYINT(3) UNSIGNED NOT NULL DEFAULT '0',
`authenticationTime` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00',
`userKey` VARCHAR(32) NOT NULL DEFAULT '',
`IP` VARCHAR(45) NOT NULL DEFAULT '',
`port` INT(10) UNSIGNED NOT NULL DEFAULT '0',
PRIMARY KEY (`Id`)
);
错误:#1064 - 您的SQL语法出错;检查手册 对应于您的MySQL服务器版本,以获得正确的语法 在'CREATE TABLE IF NOT NOT EXISTS
messages
附近使用(Id
int(255)NOT NULL AUTO_INCREMENT,'第8行
所以plz帮我纠正代码......
谢谢
答案 0 :(得分:0)
您的脚本中存在少量错误。
1)只能有一个自动增量键,必须将其定义为键
2)
中 DEFAULT 的第三个查询中拼写错误 `email` varchar(45) NOT NULL DEFAULT '',
3)DEFAULT关键字在第3个查询中使用两次以下字段,并且对于NOT NULL缺少NULL
`authenticationTime` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
CORRECT查询: -
CREATE TABLE IF NOT EXISTS `friends` (
`Id` int(10) NOT NULL AUTO_INCREMENT,
`providerid` int(10) NOT NULL ,
`requestid` int(10) NOT NULL ,
`status` binary(1) NOT NULL ,
PRIMARY KEY (`Id`));
CREATE TABLE IF NOT EXISTS `messages` (
`Id` int(255) NOT NULL AUTO_INCREMENT,
`fromuid` int(255) NOT NULL,
`touid` int(255) NOT NULL,
`sentdt` datetime NOT NULL,
`read` tinyint(1) NOT NULL DEFAULT '0',
`readdt` datetime DEFAULT NULL,
`messagetext` longtext CHARACTER SET utf8 NOT NULL ,
PRIMARY KEY (`Id`)
);
CREATE TABLE IF NOT EXISTS `users` (
`Id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`username` varchar(45) NOT NULL DEFAULT '',
`password` varchar(32) NOT NULL DEFAULT '',
`email` varchar(45) NOT NULL DEFAULT '',
`date` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
`status` tinyint(3) unsigned NOT NULL DEFAULT '0',
`authenticationTime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
`userKey` varchar(32) NOT NULL DEFAULT '',
`IP` varchar(45) NOT NULL DEFAULT '',
`port` int(10) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`Id`)
)