मुझे forward engineering
अपने MySQL डेटाबेस के साथ WAMP सर्वर में परेशानी है .. मैं स्कीमा की एक छवि पोस्ट करने जा रहा था लेकिन यह मेरी पहली पोस्ट नहीं है।
नीचे निष्पादित स्क्रिप्ट है ..
use aquaticstar;
SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES';
-- -----------------------------------------------------
-- Table `Students`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `Students` ;
CREATE TABLE IF NOT EXISTS `Students` (
`id` VARCHAR(10) NOT NULL ,
`studentName` VARCHAR(45) NOT NULL ,
`gender` CHAR NOT NULL ,
`birthDate` DATETIME NOT NULL ,
`mNo` VARCHAR(10) NOT NULL ,
`contactName` VARCHAR(45) NOT NULL ,
`contactEmail` VARCHAR(45) NOT NULL ,
`contactPhone` INT(10) NOT NULL ,
`startDate` DATETIME NOT NULL ,
`remarks` VARCHAR(200) NULL ,
PRIMARY KEY (`id`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Waiting List`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `Waiting List` ;
CREATE TABLE IF NOT EXISTS `Waiting List` (
`wait_id` VARCHAR(5) NOT NULL ,
`name` VARCHAR(45) NULL ,
`contactName` VARCHAR(45) NULL ,
`contactPhone` INT(10) NULL ,
`contactEmail` VARCHAR(45) NULL ,
`status` CHAR NULL ,
`remarks` VARCHAR(200) NULL ,
PRIMARY KEY (`wait_id`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Schedule`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `Schedule` ;
CREATE TABLE IF NOT EXISTS `Schedule` (
`lesson_id` VARCHAR(10) NOT NULL ,
`day` VARCHAR(3) NOT NULL ,
`branch` VARCHAR(30) NOT NULL ,
`level` VARCHAR(30) NOT NULL ,
`time` TIME NOT NULL ,
`ae` VARCHAR(45) NOT NULL ,
PRIMARY KEY (`lesson_id`) )
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Link`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `Link` ;
CREATE TABLE IF NOT EXISTS `Link` (
`link_id` VARCHAR(10) NOT NULL ,
`id` VARCHAR(10) NOT NULL ,
`lesson_id` VARCHAR(10) NOT NULL ,
PRIMARY KEY (`link_id`) ,
INDEX `id_idx` (`id` ASC) ,
INDEX `lesson_id_idx` (`lesson_id` ASC) ,
CONSTRAINT `id`
FOREIGN KEY (`id` )
REFERENCES `Students` (`id` )
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `lesson_id`
FOREIGN KEY (`lesson_id` )
REFERENCES `Schedule` (`lesson_id` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `Attendance`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `Attendance` ;
CREATE TABLE IF NOT EXISTS `Attendance` (
`date` DATETIME NOT NULL ,
`attendance` VARCHAR(5) NOT NULL ,
`link_id` VARCHAR(10) NOT NULL ,
INDEX `link_id_idx` (`link_id` ASC) ,
CONSTRAINT `link_id`
FOREIGN KEY (`link_id` )
REFERENCES `Link` (`link_id` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;
-- -----------------------------------------------------
-- Data for table `Students`
-- -----------------------------------------------------
START TRANSACTION;
INSERT INTO `Students` (`id`, `studentName`, `gender`, `birthDate`, `mNo`, `contactName`, `contactEmail`, `contactPhone`, `startDate`, `remarks`) VALUES ('s001', 'Sam Khew', 'm', '12/12/1991', 'nm', 'May Khew', 'may@gmail.com', 0198829387, '12/07/2011', NULL);
INSERT INTO `Students` (`id`, `studentName`, `gender`, `birthDate`, `mNo`, `contactName`, `contactEmail`, `contactPhone`, `startDate`, `remarks`) VALUES ('s002', 'Joe Biden', 'm', '13/03/2003', 'nm', 'Layla Biden', 'layla@gmail.com', 0199283763, '14/05/2011', NULL);
INSERT INTO `Students` (`id`, `studentName`, `gender`, `birthDate`, `mNo`, `contactName`, `contactEmail`, `contactPhone`, `startDate`, `remarks`) VALUES ('s003', 'Bob Builder', 'm', '14/02/2002', 'LK920K', 'Mama Builder', 'mama@yahoo.com', 0167728376, '29/02/2012', NULL);
INSERT INTO `Students` (`id`, `studentName`, `gender`, `birthDate`, `mNo`, `contactName`, `contactEmail`, `contactPhone`, `startDate`, `remarks`) VALUES ('s004', 'Kenny Koh', 'm', '18/02/1999', 'MM992', 'Lisa Koh', 'lk@hotmail.com', 0123160231, '19/01/2012', NULL);
INSERT INTO `Students` (`id`, `studentName`, `gender`, `birthDate`, `mNo`, `contactName`, `contactEmail`, `contactPhone`, `startDate`, `remarks`) VALUES ('s005', 'Jane Doe', 'f', '29/09/1999', 'nm', 'Jackie Doe', 'jackied@gmail.com', 0127736254, '02/03/2012', NULL);
INSERT INTO `Students` (`id`, `studentName`, `gender`, `birthDate`, `mNo`, `contactName`, `contactEmail`, `contactPhone`, `startDate`, `remarks`) VALUES ('s006', 'Lola Lai', 'f', '02/05/2004', 'nm', 'Mark Lai', 'mark@gmail.com', 0198827365, '11/09/2011', NULL);
COMMIT;
-- -----------------------------------------------------
-- Data for table `Schedule`
-- -----------------------------------------------------
START TRANSACTION;
INSERT INTO `Schedule` (`lesson_id`, `day`, `branch`, `level`, `time`, `ae`) VALUES ('sat1_s4', 'Sat', 'Sunway', 'basic', '4pm', 'Aini');
INSERT INTO `Schedule` (`lesson_id`, `day`, `branch`, `level`, `time`, `ae`) VALUES ('sat1_s5', 'Sat', 'Sunway', 'basic', '5pm', 'Aini');
INSERT INTO `Schedule` (`lesson_id`, `day`, `branch`, `level`, `time`, `ae`) VALUES ('sat1_s6', 'Sat', 'Sunway', 'basic', '6pm', 'Aini');
INSERT INTO `Schedule` (`lesson_id`, `day`, `branch`, `level`, `time`, `ae`) VALUES ('sat2_s4', 'Sat', 'Sunway', 'advance', '4pm', 'Nina');
INSERT INTO `Schedule` (`lesson_id`, `day`, `branch`, `level`, `time`, `ae`) VALUES ('sat2_s5', 'Sat', 'Sunway', 'advance', '5pm', 'Nina');
INSERT INTO `Schedule` (`lesson_id`, `day`, `branch`, `level`, `time`, `ae`) VALUES ('sat3_s6', 'Sat', 'Sunway', 'pre-comp', '6pm', 'Marcus');
COMMIT;
-- -----------------------------------------------------
-- Data for table `Link`
-- -----------------------------------------------------
START TRANSACTION;
INSERT INTO `Link` (`link_id`, `id`, `lesson_id`) VALUES ('L001', 's001', 'sat1_s4');
INSERT INTO `Link` (`link_id`, `id`, `lesson_id`) VALUES ('L002', 's002', 'sat1_s5');
INSERT INTO `Link` (`link_id`, `id`, `lesson_id`) VALUES ('L003', 's003', 'sat1_s6');
INSERT INTO `Link` (`link_id`, `id`, `lesson_id`) VALUES ('L004', 's004', 'sat2_s4');
INSERT INTO `Link` (`link_id`, `id`, `lesson_id`) VALUES ('L005', 's005', 'sat1_s5');
COMMIT;
-- -----------------------------------------------------
-- Data for table `Attendance`
-- -----------------------------------------------------
START TRANSACTION;
INSERT INTO `Attendance` (`date`, `attendance`, `link_id`) VALUES ('26/9/2012', '1', NULL);
COMMIT;
लेकिन तब मुझे यह त्रुटि मिलती है:
Executing SQL script in server
ERROR: Error 1005: Can't create table 'aquaticstar.link' (errno: 121)
मैं यह क्यों नहीं समझ सकता। क्या कोई मेरी मदद कर सकता है?
LATEST FOREIGN KEY ERROR
सेक्शन में स्टोर हो जाता है status
।