[英]How do I create this relationship in phpMyAdmin?
I'm following along with a book that wants me to create the following relationships in my database:我正在关注一本书,希望我在我的数据库中创建以下关系:
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;
When I try to run the SQL, I get an error like:当我尝试运行 SQL 时,出现如下错误:
#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
So, I want to try doing it (visually) in phpMyAdmin.所以,我想尝试在 phpMyAdmin 中(视觉上)这样做。 How do you do that?
你是怎样做的?
DB SQL:数据库 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`
--
Remove the quotes from around the table names - the quotes make MySQL think you're altering a string, not a table:删除表格名称周围的引号 - 引号使 MySQL 认为您正在更改字符串,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;
You should use backticks, like so:您应该使用反引号,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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