表无法创建

use helpdesk; 

CREATE TABLE IF NOT EXISTS `helpdesk`.`Ticket` (
    `T_ID` INT NOT NULL AUTO_INCREMENT, 
    `t_date` DATETIME NULL, 
    `t_equipment` VARCHAR(45) NULL, 
    `t_descript` VARCHAR(300) NULL, 
    PRIMARY KEY (`T_ID`), 
    CONSTRAINT `emp_id` 
    FOREIGN KEY() 
    REFERENCES `helpdesk`.`employee`() 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION, 
    CONSTRAINT `tech_id` 
    FOREIGN KEY() 
    REFERENCES `helpdesk`.`technician`() 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION) 
ENGINE = InnoDB;

CREATE TABLE IF NOT EXISTS `helpdesk`.`employee` (
    `emp_id` INT NOT NULL, 
    `emp_fname` VARCHAR(45) NULL, 
    `emp_lname` VARCHAR(45) NULL, 
    `emp_email` VARCHAR(45) NULL, 
    `emp_phone` VARCHAR(45) NULL, 
    `emp_dept` VARCHAR(45) NULL, 
    PRIMARY KEY (`emp_id`)) 
ENGINE = InnoDB;

CREATE TABLE IF NOT EXISTS `helpdesk`.`technician` (
    `tech_id` INT NOT NULL AUTO_INCREMENT, 
    `tech_fname` VARCHAR(45) NOT NULL, 
    `tech_lname` VARCHAR(45) NULL, 
    `tech_phone` VARCHAR(45) NULL, 
    `tech_email` VARCHAR(45) NULL, 
    PRIMARY KEY (`tech_id`)) 
ENGINE = InnoDB;

INSERT INTO HELPDESK.TECHNICIAN (tech_id, tech_fname, tech_lname, tech_phone, tech_email) 
VALUES(12345, SIERRA, RAY, 2485555555, [email protected]), 
VALUES(12344, MICHAEL, JACKSON, 2485555554, [email protected]), 
VALUES(12343, GREG, KEYSON, 2485555553, [email protected]), 
VALUES(12342, AARON, BANKS, 2485555552, [email protected]), 
VALUES(12341, PHIL, COLLINS, 2485555551, [email protected]);

出了什么问题？我的表一直给我一个1064的错误，说有一个意外的“（”由表无法创建

来源

2014-04-12 smray7

请标记（你正在使用的）RDBMS系统 – Tiny

第一FOREIGN KEY()声明。试试这个代码。

CREATE TABLE IF NOT EXISTS `helpdesk`.`employee` (
    `emp_id` INT NOT NULL, 
    `emp_fname` VARCHAR(45) NULL, 
    `emp_lname` VARCHAR(45) NULL, 
    `emp_email` VARCHAR(45) NULL, 
    `emp_phone` VARCHAR(45) NULL, 
    `emp_dept` VARCHAR(45) NULL, 
    PRIMARY KEY (`emp_id`)) 
ENGINE = InnoDB; 

CREATE TABLE IF NOT EXISTS `helpdesk`.`technician` (
    `tech_id` INT NOT NULL AUTO_INCREMENT, 
    `tech_fname` VARCHAR(45) NOT NULL, 
    `tech_lname` VARCHAR(45) NULL, 
    `tech_phone` VARCHAR(45) NULL, 
    `tech_email` VARCHAR(45) NULL, 
    PRIMARY KEY (`tech_id`)) 
ENGINE = InnoDB; 

CREATE TABLE IF NOT EXISTS `helpdesk`.`Ticket` (
    `T_ID` INT NOT NULL AUTO_INCREMENT, 
    `t_date` DATETIME NULL, 
    `t_equipment` VARCHAR(45) NULL, 
    `t_descript` VARCHAR(300) NULL, 
    `emp_id` INT NOT NULL, 
    INDEX(`emp_id`), 
    `tech_id` INT NOT NULL, 
    INDEX(`tech_id`), 
    PRIMARY KEY (`T_ID`), 
    FOREIGN KEY (`emp_id`) 
    REFERENCES `helpdesk`.`employee` (`emp_id`) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION, 
    FOREIGN KEY (`tech_id`) 
    REFERENCES `helpdesk`.`technician` (`tech_id`) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION) 
ENGINE = InnoDB;

来源

2014-04-12 05:11:30 Sushant

谢谢！所以解决的办法是让FK成为一个索引而不是一个约束，对吧？ – smray7

CONSTRAINT FOREIGN KEY (`tech_id`)

应该解决它

来源

2014-04-12 05:38:06 sss999

不，我之前尝试过，它没有工作。，但是。 – smray7

回答

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