{"id":152839,"date":"2024-11-02T02:27:21","date_gmt":"2024-11-01T18:27:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152839\/"},"modified":"2024-11-02T02:27:22","modified_gmt":"2024-11-01T18:27:22","slug":"%e6%88%90%e7%82%ba%e9%ab%98%e6%95%88%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b7%a5%e7%a8%8b%e5%b8%ab%ef%bc%8c%e9%80%99%e4%ba%9b%e6%8a%80%e8%83%bd%e5%bf%85%e5%82%99%ef%bc%81-%e6%80%8e%e6%a8%a3%e5%81%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152839\/","title":{"rendered":"\u6210\u70ba\u9ad8\u6548\u7684\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\uff0c\u9019\u4e9b\u6280\u80fd\u5fc5\u5099\uff01 (\u600e\u6a23\u505a\u597d\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b)"},"content":{"rendered":"<h1 id=\"%e6%88%90%e7%82%ba%e9%ab%98%e6%95%88%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%b7%a5%e7%a8%8b%e5%b8%ab%ef%bc%8c%e9%80%99%e4%ba%9b%e6%8a%80%e8%83%bd%e5%bf%85%e5%82%99%ef%bc%81-XKKiPENGWC\">\u6210\u70ba\u9ad8\u6548\u7684\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\uff0c\u9019\u4e9b\u6280\u80fd\u5fc5\u5099\uff01<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u7684\u89d2\u8272\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u96a8\u8457\u4f01\u696d\u5c0d\u6578\u64da\u7684\u4f9d\u8cf4\u7a0b\u5ea6\u52a0\u6df1\uff0c\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u5177\u5099\u591a\u7a2e\u6280\u80fd\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u7ba1\u7406\u548c\u5229\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6210\u70ba\u4e00\u540d\u9ad8\u6548\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u6240\u9700\u7684\u95dc\u9375\u6280\u80fd\u3002<\/p>\n<h2 id=\"1-%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ae%a1%e7%90%86%e7%b3%bb%e7%b5%b1%ef%bc%88dbms%ef%bc%89-XKKiPENGWC\">1. \u6df1\u5165\u7406\u89e3\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09<\/h2>\n<p>\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u662f\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u7684\u57fa\u790e\u3002\u719f\u6089\u4e0d\u540c\u985e\u578b\u7684DBMS\uff0c\u5982\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MySQL\u3001PostgreSQL\uff09\u548c\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MongoDB\u3001Cassandra\uff09\uff0c\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u6bcf\u7a2e\u7cfb\u7d71\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7279\u6027\u548c\u4f7f\u7528\u5834\u666f\uff0c\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u6839\u64da\u696d\u52d9\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u7cfb\u7d71\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a-XKKiPENGWC\">\u793a\u4f8b\uff1a<\/h3>\n<ul>\n<li><code>SELECT * FROM users WHERE age &gt; 30;<\/code> &#8211; \u5728MySQL\u4e2d\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\u3002<\/li>\n<li><code>db.users.find({ age: { $gt: 30 } });<\/code> &#8211; \u5728MongoDB\u4e2d\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e7%86%9f%e7%b7%b4%e6%8e%8c%e6%8f%a1sql%e8%aa%9e%e8%a8%80-XKKiPENGWC\">2. \u719f\u7df4\u638c\u63e1SQL\u8a9e\u8a00<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u8207\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4ea4\u4e92\u7684\u4e3b\u8981\u5de5\u5177\u3002\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u80fd\u5920\u7de8\u5beb\u9ad8\u6548\u7684\u67e5\u8a62\uff0c\u9032\u884c\u6578\u64da\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u3002\u9664\u4e86\u57fa\u672c\u7684\u67e5\u8a62\uff0c\u9084\u9700\u8981\u638c\u63e1\u8907\u96dc\u7684\u806f\u63a5\u3001\u5b50\u67e5\u8a62\u548c\u805a\u5408\u51fd\u6578\u7b49\u9ad8\u7d1a\u529f\u80fd\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a-XKKiPENGWC\">\u793a\u4f8b\uff1a<\/h3>\n<pre><code>\n-- \u67e5\u8a62\u6240\u6709\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\nSELECT name, email FROM users;\n\n-- \u8a08\u7b97\u6bcf\u500b\u5e74\u9f61\u6bb5\u7684\u7528\u6236\u6578\u91cf\nSELECT age, COUNT(*) FROM users GROUP BY age;\n<\/code><\/pre>\n<h2 id=\"3-%e6%95%b8%e6%93%9a%e5%bb%ba%e6%a8%a1%e8%88%87%e8%a8%ad%e8%a8%88-XKKiPENGWC\">3. \u6578\u64da\u5efa\u6a21\u8207\u8a2d\u8a08<\/h2>\n<p>\u6578\u64da\u5efa\u6a21\u662f\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u6838\u5fc3\u3002\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u80fd\u5920\u6839\u64da\u696d\u52d9\u9700\u6c42\u8a2d\u8a08\u6578\u64da\u6a21\u578b\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u9019\u5305\u62ec\u78ba\u5b9a\u5be6\u9ad4\u3001\u5c6c\u6027\u53ca\u5176\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u5e38\u898b\u7684\u6578\u64da\u5efa\u6a21\u5de5\u5177\u6709ER\u5716\uff08\u5be6\u9ad4\u95dc\u4fc2\u5716\uff09\u548cUML\uff08\u7d71\u4e00\u5efa\u6a21\u8a9e\u8a00\uff09\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a-XKKiPENGWC\">\u793a\u4f8b\uff1a<\/h3>\n<p>\u5728\u8a2d\u8a08\u4e00\u500b\u7528\u6236\u7ba1\u7406\u7cfb\u7d71\u6642\uff0c\u53ef\u80fd\u9700\u8981\u5b9a\u7fa9\u7528\u6236\u3001\u89d2\u8272\u548c\u6b0a\u9650\u7b49\u5be6\u9ad4\uff0c\u4e26\u78ba\u5b9a\u5b83\u5011\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/p>\n<h2 id=\"4-%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96-XKKiPENGWC\">4. \u6027\u80fd\u512a\u5316<\/h2>\n<p>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u512a\u5316\u8b8a\u5f97\u81f3\u95dc\u91cd\u8981\u3002\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u80fd\u5920\u8b58\u5225\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u63a1\u53d6\u63aa\u65bd\u9032\u884c\u512a\u5316\uff0c\u4f8b\u5982\u7d22\u5f15\u7684\u4f7f\u7528\u3001\u67e5\u8a62\u7684\u91cd\u5beb\u548c\u6578\u64da\u5206\u5340\u7b49\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a-XKKiPENGWC\">\u793a\u4f8b\uff1a<\/h3>\n<pre><code>\n-- \u5275\u5efa\u7d22\u5f15\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\nCREATE INDEX idx_age ON users(age);\n<\/code><\/pre>\n<h2 id=\"5-%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%e8%88%87%e5%82%99%e4%bb%bd-XKKiPENGWC\">5. \u6578\u64da\u5b89\u5168\u8207\u5099\u4efd<\/h2>\n<p>\u6578\u64da\u5b89\u5168\u662f\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u7684\u91cd\u8981\u8cac\u4efb\u4e4b\u4e00\u3002\u9700\u8981\u4e86\u89e3\u5982\u4f55\u8a2d\u7f6e\u7528\u6236\u6b0a\u9650\u3001\u52a0\u5bc6\u6578\u64da\u4ee5\u53ca\u5b9a\u671f\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u6216\u6d29\u9732\u3002\u9019\u5305\u62ec\u4f7f\u7528\u9069\u7576\u7684\u5b89\u5168\u63aa\u65bd\u4f86\u4fdd\u8b77\u6578\u64da\u5eab\u514d\u53d7\u672a\u7d93\u6388\u6b0a\u7684\u8a2a\u554f\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a-XKKiPENGWC\">\u793a\u4f8b\uff1a<\/h3>\n<p>\u4f7f\u7528\u89d2\u8272\u548c\u6b0a\u9650\u7ba1\u7406\u4f86\u9650\u5236\u7528\u6236\u5c0d\u654f\u611f\u6578\u64da\u7684\u8a2a\u554f\u3002<\/p>\n<h2 id=\"6-%e6%8c%81%e7%ba%8c%e5%ad%b8%e7%bf%92%e8%88%87%e9%81%a9%e6%87%89%e6%96%b0%e6%8a%80%e8%a1%93-XKKiPENGWC\">6. \u6301\u7e8c\u5b78\u7fd2\u8207\u9069\u61c9\u65b0\u6280\u8853<\/h2>\n<p>\u6578\u64da\u5eab\u6280\u8853\u4e0d\u65b7\u6f14\u8b8a\uff0c\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u4fdd\u6301\u5b78\u7fd2\u7684\u71b1\u60c5\uff0c\u96a8\u6642\u4e86\u89e3\u6700\u65b0\u7684\u6280\u8853\u548c\u8da8\u52e2\u3002\u53c3\u52a0\u76f8\u95dc\u7684\u57f9\u8a13\u3001\u7814\u8a0e\u6703\u548c\u793e\u5340\u6d3b\u52d5\uff0c\u53ef\u4ee5\u5e6b\u52a9\u5de5\u7a0b\u5e2b\u64f4\u5c55\u77e5\u8b58\u548c\u6280\u80fd\u3002<\/p>\n<h1 id=\"%e7%b8%bd%e7%b5%90-XKKiPENGWC\">\u7e3d\u7d50<\/h1>\n<p>\u6210\u70ba\u4e00\u540d\u9ad8\u6548\u7684\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\u9700\u8981\u638c\u63e1\u591a\u7a2e\u6280\u80fd\uff0c\u5305\u62ec\u6df1\u5165\u7406\u89e3\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3001\u719f\u7df4\u638c\u63e1SQL\u8a9e\u8a00\u3001\u6578\u64da\u5efa\u6a21\u8207\u8a2d\u8a08\u3001\u6027\u80fd\u512a\u5316\u3001\u6578\u64da\u5b89\u5168\u8207\u5099\u4efd\uff0c\u4ee5\u53ca\u6301\u7e8c\u5b78\u7fd2\u65b0\u6280\u8853\u3002\u9019\u4e9b\u6280\u80fd\u4e0d\u50c5\u80fd\u5e6b\u52a9\u5de5\u7a0b\u5e2b\u5728\u8077\u696d\u751f\u6daf\u4e2d\u53d6\u5f97\u6210\u529f\uff0c\u9084\u80fd\u70ba\u4f01\u696d\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u9805\u76ee\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1\u6578\u64da\u5eab\u8a2d\u8a08\u3001\u512a\u5316\u67e5\u8a62\u3001\u6578\u64da\u5b89\u5168\u53ca\u6545\u969c\u6392\u9664\u7b49\u6280\u80fd\uff0c\u6210\u70ba\u9ad8\u6548\u7684\u6578\u64da\u5eab\u5de5\u7a0b\u5e2b\uff0c\u63d0\u5347\u8077\u696d\u7af6\u722d\u529b\uff01<\/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-152839","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152839","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=152839"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152839\/revisions"}],"predecessor-version":[{"id":152840,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152839\/revisions\/152840"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}