{"id":161929,"date":"2024-11-04T10:31:29","date_gmt":"2024-11-04T02:31:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161929\/"},"modified":"2024-11-04T10:31:30","modified_gmt":"2024-11-04T02:31:30","slug":"%e8%a8%98%e9%8c%84%e9%9a%a8%e6%a9%9f%e7%8d%b2%e5%8f%96-list-%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%98%e9%8c%84-%e9%9a%a8%e6%a9%9f%e5%8f%96%e5%87%ba-list-%e4%b8%ad%e4%b8%80%e6%a2%9d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161929\/","title":{"rendered":"\u8a18\u9304\u96a8\u6a5f\u7372\u53d6 list \u4e2d\u7684\u6578\u64da\u5eab\u8a18\u9304 (\u96a8\u6a5f\u53d6\u51fa list \u4e2d\u4e00\u689d\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e8%a8%98%e9%8c%84%e9%9a%a8%e6%a9%9f%e7%8d%b2%e5%8f%96-list-%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%98%e9%8c%84-%e9%9a%a8%e6%a9%9f%e5%8f%96%e5%87%ba-list-%e4%b8%ad%e4%b8%80%e6%a2%9d-YCgFDlVrmf\">\u8a18\u9304\u96a8\u6a5f\u7372\u53d6 list \u4e2d\u7684\u6578\u64da\u5eab\u8a18\u9304 (\u96a8\u6a5f\u53d6\u51fa list \u4e2d\u4e00\u689d\u6578\u64da\u5eab)<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u96a8\u6a5f\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u7684\u8a18\u9304\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u70ba\u4e86\u63d0\u4f9b\u7528\u6236\u63a8\u85a6\u3001\u96a8\u6a5f\u986f\u793a\u5167\u5bb9\uff0c\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u96a8\u6a5f\u9078\u53d6\u6578\u64da\u90fd\u80fd\u589e\u5f37\u7528\u6236\u9ad4\u9a57\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u96a8\u6a5f\u7372\u53d6\u4e00\u689d\u8a18\u9304\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e9%9a%a8%e6%a9%9f%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-YCgFDlVrmf\">\u96a8\u6a5f\u7372\u53d6\u6578\u64da\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u96a8\u6a5f\u7372\u53d6\u6578\u64da\u7684\u57fa\u672c\u601d\u8def\u662f\u5f9e\u4e00\u500b\u6578\u64da\u96c6\uff08\u5982\u6578\u64da\u5eab\u8868\uff09\u4e2d\u96a8\u6a5f\u9078\u64c7\u4e00\u689d\u8a18\u9304\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u9023\u63a5\u5230\u6578\u64da\u5eab<\/li>\n<li>\u67e5\u8a62\u6578\u64da\u5eab\u4ee5\u7372\u53d6\u8a18\u9304\u7684\u7e3d\u6578<\/li>\n<li>\u751f\u6210\u4e00\u500b\u96a8\u6a5f\u6578\uff0c\u8a72\u6578\u5b57\u5728\u8a18\u9304\u7684\u7bc4\u570d\u5167<\/li>\n<li>\u4f7f\u7528\u8a72\u96a8\u6a5f\u6578\u67e5\u8a62\u5c0d\u61c9\u7684\u8a18\u9304<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sql-%e9%9a%a8%e6%a9%9f%e9%81%b8%e5%8f%96%e8%a8%98%e9%8c%84-YCgFDlVrmf\">\u4f7f\u7528 SQL \u96a8\u6a5f\u9078\u53d6\u8a18\u9304<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\u7684\u65b9\u5f0f\u53d6\u6c7a\u65bc\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"mysql-YCgFDlVrmf\">MySQL<\/h3>\n<pre><code>SELECT * FROM your_table ORDER BY RAND() LIMIT 1;<\/code><\/pre>\n<p>\u5728 MySQL \u4e2d\uff0c\u4f7f\u7528 <code>ORDER BY RAND()<\/code> \u53ef\u4ee5\u96a8\u6a5f\u6392\u5217\u7d50\u679c\uff0c\u7136\u5f8c\u4f7f\u7528 <code>LIMIT 1<\/code> \u4f86\u7372\u53d6\u4e00\u689d\u96a8\u6a5f\u8a18\u9304\u3002\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u6578\u64da\u91cf\u8f03\u5927\u6642\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002<\/p>\n<h3 id=\"postgresql-YCgFDlVrmf\">PostgreSQL<\/h3>\n<pre><code>SELECT * FROM your_table ORDER BY RANDOM() LIMIT 1;<\/code><\/pre>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u4f7f\u7528 <code>ORDER BY RANDOM()<\/code> \u4f86\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\uff0c\u8207 MySQL \u7684\u65b9\u6cd5\u985e\u4f3c\u3002<\/p>\n<h3 id=\"sqlite-YCgFDlVrmf\">SQLite<\/h3>\n<pre><code>SELECT * FROM your_table ORDER BY RANDOM() LIMIT 1;<\/code><\/pre>\n<p>SQLite \u4e5f\u4f7f\u7528 <code>ORDER BY RANDOM()<\/code> \u4f86\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\uff0c\u9019\u4f7f\u5f97\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\uff0c\u96a8\u6a5f\u9078\u53d6\u7684\u8a9e\u6cd5\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%b7%a8%e7%a8%8b%e8%aa%9e%e8%a8%80%e9%9a%a8%e6%a9%9f%e9%81%b8%e5%8f%96%e8%a8%98%e9%8c%84-YCgFDlVrmf\">\u4f7f\u7528\u7de8\u7a0b\u8a9e\u8a00\u96a8\u6a5f\u9078\u53d6\u8a18\u9304<\/h2>\n<p>\u9664\u4e86\u76f4\u63a5\u4f7f\u7528 SQL \u67e5\u8a62\u5916\uff0c\u9084\u53ef\u4ee5\u901a\u904e\u7de8\u7a0b\u8a9e\u8a00\u4f86\u5be6\u73fe\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\u7684\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Python \u548c SQLAlchemy \u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>from sqlalchemy import create_engine, select\nfrom sqlalchemy.orm import sessionmaker\nimport random\n\n# \u5275\u5efa\u6578\u64da\u5eab\u5f15\u64ce\nengine = create_engine('sqlite:\/\/\/your_database.db')\nSession = sessionmaker(bind=engine)\nsession = Session()\n\n# \u7372\u53d6\u6240\u6709\u8a18\u9304\nrecords = session.execute(select(your_table)).fetchall()\n\n# \u96a8\u6a5f\u9078\u53d6\u4e00\u689d\u8a18\u9304\nrandom_record = random.choice(records)\nprint(random_record)\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u6240\u6709\u8a18\u9304\uff0c\u7136\u5f8c\u4f7f\u7528 Python \u7684 <code>random.choice()<\/code> \u51fd\u6578\u96a8\u6a5f\u9078\u53d6\u4e00\u689d\u8a18\u9304\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u6578\u64da\u91cf\u8f03\u5c0f\u7684\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u6548\uff0c\u4f46\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u53ef\u80fd\u9700\u8981\u8003\u616e\u6027\u80fd\u554f\u984c\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-YCgFDlVrmf\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u9078\u64c7\u96a8\u6a5f\u8a18\u9304\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u4f7f\u7528 <code>ORDER BY RAND()<\/code> \u6216 <code>ORDER BY RANDOM()<\/code> \u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u70ba\u4e86\u63d0\u9ad8\u6548\u7387\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u6578\u64da\u5eab\u7684\u4e3b\u9375\u6216\u7d22\u5f15\u4f86\u751f\u6210\u96a8\u6a5f\u6578\uff0c\u7136\u5f8c\u76f4\u63a5\u67e5\u8a62\u8a72\u8a18\u9304\u3002<\/li>\n<li>\u5b9a\u671f\u66f4\u65b0\u4e00\u500b\u96a8\u6a5f\u8a18\u9304\u7684\u5feb\u53d6\uff0c\u4ee5\u6e1b\u5c11\u67e5\u8a62\u6b21\u6578\u3002<\/li>\n<li>\u4f7f\u7528\u5206\u9801\u67e5\u8a62\uff0c\u96a8\u6a5f\u9078\u64c7\u4e00\u500b\u9801\u9762\uff0c\u7136\u5f8c\u5f9e\u8a72\u9801\u9762\u4e2d\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-YCgFDlVrmf\">\u7e3d\u7d50<\/h2>\n<p>\u96a8\u6a5f\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u7684\u8a18\u9304\u662f\u4e00\u500b\u6709\u7528\u7684\u6280\u8853\uff0c\u80fd\u5920\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u9748\u6d3b\u6027\u548c\u7528\u6236\u9ad4\u9a57\u3002\u7121\u8ad6\u662f\u4f7f\u7528 SQL \u67e5\u8a62\u9084\u662f\u7de8\u7a0b\u8a9e\u8a00\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u3002\u5728\u8003\u616e\u6027\u80fd\u7684\u540c\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u67b6\u69cb\u4e5f\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u96a8\u6a5f\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u4e00\u689d\u8a18\u9304\uff0c\u7c21\u5316\u6578\u64da\u6aa2\u7d22\u904e\u7a0b\uff0c\u63d0\u5347\u6548\u7387\uff0c\u9069\u7528\u65bc\u5404\u985e\u61c9\u7528\u5834\u666f\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-161929","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161929","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=161929"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161929\/revisions"}],"predecessor-version":[{"id":161930,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161929\/revisions\/161930"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}