[英]How do I create this relationship in phpMyAdmin?
我正在關注一本書,希望我在我的數據庫中創建以下關系:
ALTER TABLE 'tbl_issue' ADD CONSTRAINT 'FK_issue_project' FOREIGN KEY ('project_id') REFERENCES 'tbl_project' ('id') ON DELETE CASCADE ON UPDATE RESTRICT;
ALTER TABLE 'tbl_issue' ADD CONSTRAINT 'FK_issue_owner' FOREIGN KEY ('owner_id') REFERENCES 'tbl_user' ('id') ON DELETE CASCADE ON UPDATE RESTRICT;
ALTER TABLE 'tbl_issue' ADD CONSTRAINT 'FK_issue_requester' FOREIGN KEY ('requester_id') REFERENCES 'tbl_user' ('id') ON DELETE CASCADE ON UPDATE RESTRICT;
ALTER TABLE 'tbl_project_user' ADD CONSTRAINT 'FK_project_ user' FOREIGN KEY ('project_id') REFERENCES 'tbl_project' ('id') ON DELETE CASCADE ON UPDATE RESTRICT;
ALTER TABLE 'tbl_project_user' ADD CONSTRAINT 'FK_user_ project' FOREIGN KEY ('user_id') REFERENCES 'tbl_user' ('id') ON DELETE CASCADE ON UPDATE RESTRICT;
當我嘗試運行 SQL 時,出現如下錯誤:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''tbl_issue' ADD CONSTRAINT 'FK_issue_project' FOREIGN KEY ('project_id') REFEREN' at line 1
所以,我想嘗試在 phpMyAdmin 中(視覺上)這樣做。 你是怎樣做的?
數據庫 SQL:
-- phpMyAdmin SQL Dump
-- version 3.3.9.2
-- http://www.phpmyadmin.net
--
-- Host: localhost
-- Generation Time: May 24, 2011 at 01:27 PM
-- Server version: 5.5.9
-- PHP Version: 5.3.5
SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
--
-- Database: `trackstar`
--
-- --------------------------------------------------------
--
-- Table structure for table `tbl_issue`
--
CREATE TABLE `tbl_issue` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(256) NOT NULL,
`description` varchar(2000) DEFAULT NULL,
`project_id` int(11) DEFAULT NULL,
`type_id` int(11) DEFAULT NULL,
`status_id` int(11) DEFAULT NULL,
`owner_id` int(11) DEFAULT NULL,
`requester_id` int(11) DEFAULT NULL,
`create_time` datetime DEFAULT NULL,
`create_user_id` int(11) DEFAULT NULL,
`update_time` datetime DEFAULT NULL,
`update_user_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
--
-- Dumping data for table `tbl_issue`
--
-- --------------------------------------------------------
--
-- Table structure for table `tbl_project`
--
CREATE TABLE `tbl_project` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(128) DEFAULT NULL,
`description` text,
`create_time` datetime DEFAULT NULL,
`create_user_id` int(11) DEFAULT NULL,
`update_time` datetime DEFAULT NULL,
`update_user_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
--
-- Dumping data for table `tbl_project`
--
-- --------------------------------------------------------
--
-- Table structure for table `tbl_project_user`
--
CREATE TABLE `tbl_project_user` (
`project_id` int(11) NOT NULL,
`user_id` int(11) NOT NULL,
`create_time` datetime DEFAULT NULL,
`create_user_id` int(11) DEFAULT NULL,
`update_time` datetime DEFAULT NULL,
`update_user_id` int(11) DEFAULT NULL,
PRIMARY KEY (`project_id`,`user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
--
-- Dumping data for table `tbl_project_user`
--
-- --------------------------------------------------------
--
-- Table structure for table `tbl_user`
--
CREATE TABLE `tbl_user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`email` varchar(256) NOT NULL,
`username` varchar(256) DEFAULT NULL,
`password` varchar(256) DEFAULT NULL,
`last_login_time` datetime DEFAULT NULL,
`create_time` datetime DEFAULT NULL,
`create_user_id` int(11) DEFAULT NULL,
`update_time` datetime DEFAULT NULL,
`update_user_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
--
-- Dumping data for table `tbl_user`
--
刪除表格名稱周圍的引號 - 引號使 MySQL 認為您正在更改字符串,而不是表格:
ALTER TABLE tbl_issue ADD CONSTRAINT 'FK_issue_project' FOREIGN KEY ('project_id') REFERENCES tbl_project ('id') ON DELETE CASCADE ON UPDATE RESTRICT;
您應該使用反引號,如下所示:
ALTER TABLE `tbl_issue`
ADD CONSTRAINT `FK_issue_project` FOREIGN KEY (`project_id`)
REFERENCES `tbl_project` (`id`) ON DELETE CASCADE ON UPDATE RESTRICT;
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