{"id":197,"date":"2024-06-15T19:59:07","date_gmt":"2024-06-15T11:59:07","guid":{"rendered":"http:\/\/zhaoyanqi.cn\/?p=197"},"modified":"2024-06-19T22:15:50","modified_gmt":"2024-06-19T14:15:50","slug":"mysql%e4%b8%80%e4%ba%9b%e5%9f%ba%e6%9c%ac%e6%93%8d%e4%bd%9c3%ef%bc%88%e5%a2%9e%e5%88%a0%e6%94%b9%e6%9f%a5%e5%ae%9e%e9%99%85%e5%ba%94%e7%94%a8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/zhaoyanqi.cn\/?p=197","title":{"rendered":"\u5b9e\u9a8c\uff1amysql\u4e00\u4e9b\u57fa\u672c\u64cd\u4f5c3\uff08\u589e\u5220\u6539\u67e5\u5b9e\u9645\u5e94\u7528\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"AbzOH\">\u5b9e\u9a8c\uff1a\u8bbe\u8ba1\u4e00\u4e2a\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u7684\u6570\u636e\u5e93<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"e483f436\">1. \u8bbe\u8ba1\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u7684\u8868\u7ed3\u6784\u53ca\u5173\u7cfb<\/h3>\n\n\n\n<p id=\"uee3d957b\">\u6839\u636e\u9700\u6c42\uff0c\u53ef\u4ee5\u8bbe\u8ba1\u4ee5\u4e0b\u8868\u7ed3\u6784\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>students<\/strong>\uff1a\u5b58\u50a8\u5b66\u751f\u4fe1\u606f<\/li>\n\n\n\n<li><strong>classes<\/strong>\uff1a\u5b58\u50a8\u73ed\u7ea7\u4fe1\u606f<\/li>\n\n\n\n<li><strong>courses<\/strong>\uff1a\u5b58\u50a8\u8bfe\u7a0b\u4fe1\u606f<\/li>\n\n\n\n<li><strong>teachers<\/strong>\uff1a\u5b58\u50a8\u8001\u5e08\u4fe1\u606f<\/li>\n\n\n\n<li><strong>class_courses<\/strong>\uff1a\u5b58\u50a8\u73ed\u7ea7\u4e0e\u8bfe\u7a0b\u7684\u591a\u5bf9\u591a\u5173\u7cfb<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"64d81f2b\">\u8868\u7ed3\u6784\u8bbe\u8ba1<\/h4>\n\n\n\n<p id=\"ue6576877\"><strong>students \u8868<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>student_id (INT, PRIMARY KEY, AUTO_INCREMENT)<\/li>\n\n\n\n<li>name (VARCHAR)<\/li>\n\n\n\n<li>class_id (INT, FOREIGN KEY references classes(class_id))<\/li>\n<\/ul>\n\n\n\n<p id=\"ud32f220b\"><strong>classes \u8868<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>class_id (INT, PRIMARY KEY, AUTO_INCREMENT)<\/li>\n\n\n\n<li>class_name (VARCHAR)<\/li>\n<\/ul>\n\n\n\n<p id=\"u89f16529\"><strong>courses \u8868<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>course_id (INT, PRIMARY KEY, AUTO_INCREMENT)<\/li>\n\n\n\n<li>course_name (VARCHAR)<\/li>\n\n\n\n<li>teacher_id (INT, FOREIGN KEY references teachers(teacher_id))<\/li>\n<\/ul>\n\n\n\n<p id=\"u0da77257\"><strong>teachers \u8868<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>teacher_id (INT, PRIMARY KEY, AUTO_INCREMENT)<\/li>\n\n\n\n<li>name (VARCHAR)<\/li>\n<\/ul>\n\n\n\n<p id=\"ua03482de\"><strong>class_courses \u8868<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>class_id (INT, FOREIGN KEY references classes(class_id))<\/li>\n\n\n\n<li>course_id (INT, FOREIGN KEY references courses(course_id))<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"e5cd8b68\">\u8868\u5173\u7cfb<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b66\u751f (students) \u901a\u8fc7 class_id \u5173\u8054\u5230\u73ed\u7ea7 (classes)\u3002<\/li>\n\n\n\n<li>\u73ed\u7ea7 (classes) \u901a\u8fc7 class_id \u5728 class_courses \u8868\u4e2d\u5173\u8054\u5230\u8bfe\u7a0b (courses)\u3002<\/li>\n\n\n\n<li>\u8bfe\u7a0b (courses) \u901a\u8fc7 teacher_id \u5173\u8054\u5230\u8001\u5e08 (teachers)\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"91ea53ad\">2. \u63d2\u5165\u6570\u636e<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"5a7c2c1b\">\u521b\u5efa\u8868\u7ed3\u6784\u7684 SQL \u8bed\u53e5<\/h4>\n\n\n\n<pre id=\"402a55a7\" class=\"wp-block-code\"><code>CREATE TABLE teachers (\n    teacher_id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(50)\n);\n\nCREATE TABLE classes (\n    class_id INT AUTO_INCREMENT PRIMARY KEY,\n    class_name VARCHAR(50)\n);\n\nCREATE TABLE students (\n    student_id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(50),\n    class_id INT,\n    FOREIGN KEY (class_id) REFERENCES classes(class_id)\n);\n\nCREATE TABLE courses (\n    course_id INT AUTO_INCREMENT PRIMARY KEY,\n    course_name VARCHAR(50),\n    teacher_id INT,\n    FOREIGN KEY (teacher_id) REFERENCES teachers(teacher_id)\n);\n\nCREATE TABLE class_courses (\n    class_id INT,\n    course_id INT,\n    FOREIGN KEY (class_id) REFERENCES classes(class_id),\n    FOREIGN KEY (course_id) REFERENCES courses(course_id)\n);<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-31.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"431\" height=\"307\" data-original=\"https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-31.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-199\"  sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"d03b7efb\">\u63d2\u5165\u6570\u636e\u7684 SQL \u8bed\u53e5<\/h4>\n\n\n\n<p id=\"uefde8616\"><strong>\u63d2\u5165\u73ed\u7ea7<\/strong><\/p>\n\n\n\n<pre id=\"da71ce94\" class=\"wp-block-code\"><code>INSERT INTO classes (class_name) VALUES \n('Class 1'),\n('Class 2'),\n('Class 3');<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-32.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"314\" height=\"223\" data-original=\"https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-32.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-200\"  sizes=\"auto, (max-width: 314px) 100vw, 314px\" \/><\/div><\/figure>\n\n\n\n<p id=\"ubaa842f1\"><strong>\u63d2\u5165\u5b66\u751f<\/strong><\/p>\n\n\n\n<pre id=\"2dd049c9\" class=\"wp-block-code\"><code>INSERT INTO students (name, class_id) VALUES\n('Student 1', 1),\n('Student 2', 1),\n('Student 3', 1),\n('Student 4', 2),\n('Student 5', 2),\n('Student 6', 2),\n('Student 7', 3),\n('Student 8', 3),\n('Student 9', 3);<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-33.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"404\" height=\"367\" data-original=\"https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-33.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-201\"  sizes=\"auto, (max-width: 404px) 100vw, 404px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u54cb4a37\"><strong>\u63d2\u5165\u8001\u5e08<\/strong><\/p>\n\n\n\n<pre id=\"4025c595\" class=\"wp-block-code\"><code>INSERT INTO teachers (name) VALUES \n('Teacher 1'),\n('Teacher 2'),\n('Teacher 3'),\n('Teacher 4'),\n('Teacher 5'),\n('Teacher 6');<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-34.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"332\" height=\"277\" data-original=\"https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-34.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-202\"  sizes=\"auto, (max-width: 332px) 100vw, 332px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u78f9821d\"><strong>\u63d2\u5165\u8bfe\u7a0b<\/strong><\/p>\n\n\n\n<pre id=\"704b8449\" class=\"wp-block-code\"><code>INSERT INTO courses (course_name, teacher_id) VALUES\n('Python', 1),\n('Linux', 2),\n('Go', 3),\n('PHP', 4),\n('Java', 5),\n('K8s', 6);<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-35.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"431\" height=\"282\" data-original=\"https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-35.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-203\"  sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u67ecd2de\"><strong>\u63d2\u5165\u73ed\u7ea7\u548c\u8bfe\u7a0b\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<pre id=\"6f743258\" class=\"wp-block-code\"><code>-- Class 1\nINSERT INTO class_courses (class_id, course_id) VALUES \n(1, 1), -- Python\n(1, 3), -- Go\n(1, 4); -- PHP\n\n-- Class 2\nINSERT INTO class_courses (class_id, course_id) VALUES \n(2, 2), -- Linux\n(2, 3), -- Go\n(2, 6); -- K8s\n\n-- Class 3\nINSERT INTO class_courses (class_id, course_id) VALUES \n(3, 6), -- K8s\n(3, 5), -- Java\n(3, 2); -- Linux<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-36.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"378\" height=\"395\" data-original=\"https:\/\/zhaoyanqi.cn\/wp-content\/uploads\/2024\/06\/image-36.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-204\"  sizes=\"auto, (max-width: 378px) 100vw, 378px\" \/><\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u5b9e\u9a8c\uff1a\u8bbe\u8ba1\u4e00\u4e2a\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u7684\u6570\u636e\u5e93 1. \u8bbe\u8ba1\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u7684\u8868\u7ed3\u6784\u53ca\u5173\u7cfb \u6839\u636e\u9700\u6c42\uff0c\u53ef\u4ee5\u8bbe\u8ba1\u4ee5\u4e0b\u8868\u7ed3\u6784\uff1a \u8868\u7ed3 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,8],"tags":[10],"class_list":["post-197","post","type-post","status-publish","format-standard","hentry","category-mysql_basic_management","category-mysql","tag-mysql_lab"],"_links":{"self":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=197"}],"version-history":[{"count":2,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/197\/revisions"}],"predecessor-version":[{"id":272,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=\/wp\/v2\/posts\/197\/revisions\/272"}],"wp:attachment":[{"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhaoyanqi.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}