{"id":180072,"date":"2024-11-09T07:10:20","date_gmt":"2024-11-08T23:10:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180072\/"},"modified":"2024-11-09T07:10:20","modified_gmt":"2024-11-08T23:10:20","slug":"%e5%a6%82%e4%bd%95%e5%81%9a%e5%a5%bd%e8%a1%a8%e7%b5%90%e6%a7%8b%e8%a8%ad%e8%a8%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180072\/","title":{"rendered":"\u5982\u4f55\u505a\u597d\u8868\u7d50\u69cb\u8a2d\u8a08\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%81%9a%e5%a5%bd%e8%a1%a8%e7%b5%90%e6%a7%8b%e8%a8%ad%e8%a8%88%ef%bc%9f-kHwZswFwGT\">\u5982\u4f55\u505a\u597d\u8868\u7d50\u69cb\u8a2d\u8a08\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u8868\u7d50\u69cb\u7684\u8a2d\u8a08\u662f\u81f3\u95dc\u91cd\u8981\u7684\u4e00\u6b65\u3002\u826f\u597d\u7684\u8868\u7d50\u69cb\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u7684\u5b58\u53d6\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u505a\u597d\u8868\u7d50\u69cb\u8a2d\u8a08\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u5efa\u8b70\u548c\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"1-%e7%a2%ba%e5%ae%9a%e9%9c%80%e6%b1%82-kHwZswFwGT\">1. \u78ba\u5b9a\u9700\u6c42<\/h2>\n<p>\u5728\u958b\u59cb\u8a2d\u8a08\u8868\u7d50\u69cb\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u660e\u78ba\u7cfb\u7d71\u7684\u9700\u6c42\u3002\u9019\u5305\u62ec\u4e86\u89e3\u696d\u52d9\u6d41\u7a0b\u3001\u6578\u64da\u7684\u985e\u578b\u4ee5\u53ca\u7528\u6236\u7684\u9700\u6c42\u3002\u8207\u76f8\u95dc\u5229\u76ca\u76f8\u95dc\u8005\u9032\u884c\u6df1\u5165\u7684\u8a0e\u8ad6\uff0c\u80fd\u5920\u5e6b\u52a9\u8a2d\u8a08\u8005\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u4f7f\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"2-%e6%ad%a3%e8%a6%8f%e5%8c%96%e6%95%b8%e6%93%9a-kHwZswFwGT\">2. \u6b63\u898f\u5316\u6578\u64da<\/h2>\n<p>\u6b63\u898f\u5316\u662f\u6307\u5c07\u6578\u64da\u5206\u89e3\u6210\u591a\u500b\u8868\uff0c\u4ee5\u6d88\u9664\u5197\u9918\u548c\u4f9d\u8cf4\u6027\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u5206\u70ba\u5e7e\u500b\u968e\u6bb5\uff0c\u7a31\u70ba\u6b63\u898f\u5f62\u5f0f\u3002\u4ee5\u4e0b\u662f\u5e38\u898b\u7684\u6b63\u898f\u5f62\u5f0f\uff1a<\/p>\n<ul>\n<li><strong>\u7b2c\u4e00\u6b63\u898f\u5f62\u5f0f (1NF)<\/strong>: \u78ba\u4fdd\u6bcf\u500b\u6b04\u4f4d\u90fd\u662f\u539f\u5b50\u6027\u7684\uff0c\u5373\u6bcf\u500b\u6b04\u4f4d\u53ea\u80fd\u5305\u542b\u4e00\u500b\u503c\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u6b63\u898f\u5f62\u5f0f (2NF)<\/strong>: \u78ba\u4fdd\u6bcf\u500b\u975e\u4e3b\u9375\u6b04\u4f4d\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u6b63\u898f\u5f62\u5f0f (3NF)<\/strong>: \u78ba\u4fdd\u6bcf\u500b\u975e\u4e3b\u9375\u6b04\u4f4d\u4e0d\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u4e3b\u9375\u6b04\u4f4d\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5b78\u751f\u8868\uff0c\u5305\u542b\u5b78\u751f\u7684\u59d3\u540d\u3001\u5b78\u865f\u548c\u8ab2\u7a0b\u3002\u82e5\u4e00\u500b\u5b78\u751f\u53ef\u4ee5\u9078\u64c7\u591a\u500b\u8ab2\u7a0b\uff0c\u5247\u61c9\u5c07\u8ab2\u7a0b\u4fe1\u606f\u5206\u96e2\u5230\u53e6\u4e00\u500b\u8868\u4e2d\uff0c\u4ee5\u907f\u514d\u6578\u64da\u5197\u9918\u3002<\/p>\n<pre><code>CREATE TABLE Students (\n    StudentID INT PRIMARY KEY,\n    Name VARCHAR(100)\n);\n\nCREATE TABLE Courses (\n    CourseID INT PRIMARY KEY,\n    CourseName VARCHAR(100)\n);\n\nCREATE TABLE StudentCourses (\n    StudentID INT,\n    CourseID INT,\n    PRIMARY KEY (StudentID, CourseID),\n    FOREIGN KEY (StudentID) REFERENCES Students(StudentID),\n    FOREIGN KEY (CourseID) REFERENCES Courses(CourseID)\n);\n<\/code><\/pre>\n<h2 id=\"3-%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-kHwZswFwGT\">3. \u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728\u8a2d\u8a08\u8868\u7d50\u69cb\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u6703\u5f71\u97ff\u5b58\u5132\u7a7a\u9593\u548c\u67e5\u8a62\u6027\u80fd\u3002\u5e38\u898b\u7684\u6578\u64da\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6574\u6578\u578b (INT)<\/strong>: \u7528\u65bc\u5b58\u5132\u6574\u6578\u6578\u64da\u3002<\/li>\n<li><strong>\u6d6e\u9ede\u578b (FLOAT)<\/strong>: \u7528\u65bc\u5b58\u5132\u5e36\u5c0f\u6578\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u5b57\u7b26\u578b (VARCHAR)<\/strong>: \u7528\u65bc\u5b58\u5132\u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>\u65e5\u671f\u578b (DATE)<\/strong>: \u7528\u65bc\u5b58\u5132\u65e5\u671f\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5c0d\u65bc\u5b78\u751f\u7684\u51fa\u751f\u65e5\u671f\uff0c\u61c9\u4f7f\u7528\u65e5\u671f\u578b\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u3002<\/p>\n<pre><code>CREATE TABLE Students (\n    StudentID INT PRIMARY KEY,\n    Name VARCHAR(100),\n    BirthDate DATE\n);\n<\/code><\/pre>\n<h2 id=\"4-%e8%a8%ad%e8%a8%88%e7%b4%a2%e5%bc%95-kHwZswFwGT\">4. \u8a2d\u8a08\u7d22\u5f15<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u5728\u8868\u7684\u67d0\u4e9b\u6b04\u4f4d\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002\u7136\u800c\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u7684\u63d2\u5165\u548c\u66f4\u65b0\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u8b39\u614e\u9078\u64c7\u3002<\/p>\n<pre><code>CREATE INDEX idx_student_name ON Students(Name);\n<\/code><\/pre>\n<h2 id=\"5-%e8%80%83%e6%85%ae%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-kHwZswFwGT\">5. \u8003\u616e\u6578\u64da\u5b8c\u6574\u6027<\/h2>\n<p>\u6578\u64da\u5b8c\u6574\u6027\u662f\u6307\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u3002\u5728\u8a2d\u8a08\u8868\u7d50\u69cb\u6642\uff0c\u61c9\u8003\u616e\u4f7f\u7528\u7d04\u675f\u689d\u4ef6\u4f86\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u5e38\u898b\u7684\u7d04\u675f\u689d\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u4e3b\u9375\u7d04\u675f (PRIMARY KEY)<\/strong>: \u78ba\u4fdd\u6bcf\u884c\u6578\u64da\u7684\u552f\u4e00\u6027\u3002<\/li>\n<li><strong>\u5916\u9375\u7d04\u675f (FOREIGN KEY)<\/strong>: \u78ba\u4fdd\u6578\u64da\u4e4b\u9593\u7684\u53c3\u7167\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u975e\u7a7a\u7d04\u675f (NOT NULL)<\/strong>: \u78ba\u4fdd\u67d0\u4e9b\u6b04\u4f4d\u4e0d\u80fd\u70ba\u7a7a\u3002<\/li>\n<\/ul>\n<pre><code>CREATE TABLE Students (\n    StudentID INT PRIMARY KEY,\n    Name VARCHAR(100) NOT NULL,\n    BirthDate DATE\n);\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-kHwZswFwGT\">\u7e3d\u7d50<\/h2>\n<p>\u505a\u597d\u8868\u7d50\u69cb\u8a2d\u8a08\u9700\u8981\u6df1\u5165\u4e86\u89e3\u696d\u52d9\u9700\u6c42\uff0c\u5408\u7406\u6b63\u898f\u5316\u6578\u64da\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u8a2d\u8a08\u6709\u6548\u7684\u7d22\u5f15\uff0c\u4e26\u8003\u616e\u6578\u64da\u5b8c\u6574\u6027\u3002\u9019\u4e9b\u6b65\u9a5f\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5efa\u7acb\u4e00\u500b\u9ad8\u6548\u3001\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1\u8868\u7d50\u69cb\u8a2d\u8a08\u7684\u8981\u9ede\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u53ef\u7dad\u8b77\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\u6027\uff0c\u52a9\u529b\u696d\u52d9\u767c\u5c55\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-180072","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=180072"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180072\/revisions"}],"predecessor-version":[{"id":180073,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180072\/revisions\/180073"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}