{"id":179814,"date":"2024-11-09T05:01:16","date_gmt":"2024-11-08T21:01:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179814\/"},"modified":"2024-11-09T05:01:17","modified_gmt":"2024-11-08T21:01:17","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9f%a5%e6%89%be%e6%9c%80%e8%bf%91%e7%9a%84%e6%99%82%e9%96%93%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e7%95%b6%e5%89%8d%e6%99%82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179814\/","title":{"rendered":"\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\uff1f (\u6578\u64da\u5eab\u67e5\u7576\u524d\u6642\u9593\u6700\u8fd1\u6642\u9593)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9f%a5%e6%89%be%e6%9c%80%e8%bf%91%e7%9a%84%e6%99%82%e9%96%93%ef%bc%9f-GVeoNCmVZh\">\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u5206\u6790\u6578\u64da\u6216\u751f\u6210\u5831\u544a\u6642\u3002\u7121\u8ad6\u662f\u7528\u65bc\u65e5\u8a8c\u8a18\u9304\u3001\u4ea4\u6613\u8a18\u9304\u9084\u662f\u5176\u4ed6\u6642\u9593\u6233\u6578\u64da\uff0c\u80fd\u5920\u5feb\u901f\u6709\u6548\u5730\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\u5c0d\u65bc\u6578\u64da\u7684\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u4e0d\u540c\u985e\u578b\u7684\u6578\u64da\u5eab\u4e2d\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%90%86%e8%a7%a3%e6%99%82%e9%96%93%e6%88%b3-GVeoNCmVZh\">\u7406\u89e3\u6642\u9593\u6233<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6642\u9593\u6233\u901a\u5e38\u4ee5\u65e5\u671f\u548c\u6642\u9593\u7684\u683c\u5f0f\u5b58\u5132\u3002\u9019\u4e9b\u6642\u9593\u6233\u53ef\u4ee5\u662f UTC \u6642\u9593\uff0c\u4e5f\u53ef\u4ee5\u662f\u672c\u5730\u6642\u9593\uff0c\u5177\u9ad4\u53d6\u6c7a\u65bc\u61c9\u7528\u7684\u9700\u6c42\u3002\u4e86\u89e3\u6642\u9593\u6233\u7684\u683c\u5f0f\u548c\u5b58\u5132\u65b9\u5f0f\u662f\u67e5\u627e\u6700\u8fd1\u6642\u9593\u7684\u7b2c\u4e00\u6b65\u3002<\/p>\n<h2 id=\"%e5%9c%a8-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9f%a5%e6%89%be%e6%9c%80%e8%bf%91%e7%9a%84%e6%99%82%e9%96%93-GVeoNCmVZh\">\u5728 SQL \u6578\u64da\u5eab\u4e2d\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593<\/h2>\n<p>\u5728 SQL \u6578\u64da\u5eab\u4e2d\uff0c\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\u901a\u5e38\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684 SQL \u6578\u64da\u5eab\uff08\u5982 MySQL \u548c PostgreSQL\uff09\u4e2d\u67e5\u627e\u6700\u8fd1\u6642\u9593\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"mysql-%e7%a4%ba%e4%be%8b-GVeoNCmVZh\">MySQL \u793a\u4f8b<\/h3>\n<pre><code>SELECT MAX(created_at) AS latest_time\nFROM your_table_name;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>MAX()<\/code> \u51fd\u6578\u7528\u65bc\u67e5\u627e <code>created_at<\/code> \u5217\u4e2d\u7684\u6700\u5927\u503c\uff0c\u5373\u6700\u8fd1\u7684\u6642\u9593\u3002\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u8a72\u8868\u4e2d\u6700\u65b0\u7684\u6642\u9593\u6233\u3002<\/p>\n<h3 id=\"postgresql-%e7%a4%ba%e4%be%8b-GVeoNCmVZh\">PostgreSQL \u793a\u4f8b<\/h3>\n<pre><code>SELECT created_at\nFROM your_table_name\nORDER BY created_at DESC\nLIMIT 1;<\/code><\/pre>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\u5c07\u7d50\u679c\u6309\u6642\u9593\u6233\u964d\u5e8f\u6392\u5217\uff0c\u7136\u5f8c\u4f7f\u7528 <code>LIMIT 1<\/code> \u4f86\u7372\u53d6\u6700\u65b0\u7684\u6642\u9593\u3002<\/p>\n<h2 id=\"%e5%9c%a8-nosql-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9f%a5%e6%89%be%e6%9c%80%e8%bf%91%e7%9a%84%e6%99%82%e9%96%93-GVeoNCmVZh\">\u5728 NoSQL \u6578\u64da\u5eab\u4e2d\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593<\/h2>\n<p>\u5c0d\u65bc NoSQL \u6578\u64da\u5eab\uff0c\u5982 MongoDB\uff0c\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\u4e5f\u6709\u5176\u7279\u5b9a\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f MongoDB \u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>db.your_collection_name.find().sort({ created_at: -1 }).limit(1);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>sort()<\/code> \u65b9\u6cd5\u7528\u65bc\u6309 <code>created_at<\/code> \u5b57\u6bb5\u964d\u5e8f\u6392\u5217\uff0c\u7136\u5f8c\u4f7f\u7528 <code>limit(1)<\/code> \u7372\u53d6\u6700\u65b0\u7684\u6587\u6a94\u3002<\/p>\n<h2 id=\"%e8%80%83%e6%85%ae%e6%99%82%e5%8d%80%e5%95%8f%e9%a1%8c-GVeoNCmVZh\">\u8003\u616e\u6642\u5340\u554f\u984c<\/h2>\n<p>\u5728\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\u6642\uff0c\u6642\u5340\u554f\u984c\u662f\u4e0d\u53ef\u5ffd\u8996\u7684\u3002\u78ba\u4fdd\u5728\u67e5\u8a62\u6642\u8003\u616e\u5230\u6578\u64da\u7684\u6642\u5340\uff0c\u7279\u5225\u662f\u5728\u8de8\u570b\u696d\u52d9\u4e2d\u3002\u53ef\u4ee5\u4f7f\u7528 SQL \u7684 <code>CONVERT_TZ()<\/code> \u51fd\u6578\u6216\u5728\u61c9\u7528\u5c64\u9762\u9032\u884c\u6642\u5340\u8f49\u63db\uff0c\u4ee5\u78ba\u4fdd\u7372\u53d6\u7684\u6642\u9593\u662f\u6e96\u78ba\u7684\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-GVeoNCmVZh\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u6027\u80fd\u53ef\u80fd\u6210\u70ba\u4e00\u500b\u554f\u984c\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u5c0d\u6642\u9593\u6233\u5b57\u6bb5\u5efa\u7acb\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u983b\u7e41\u67e5\u627e\u6700\u8fd1\u6642\u9593\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GVeoNCmVZh\">\u7e3d\u7d50<\/h2>\n<p>\u67e5\u627e\u6578\u64da\u5eab\u4e2d\u6700\u8fd1\u7684\u6642\u9593\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u80fd\uff0c\u7121\u8ad6\u662f\u5728 SQL \u9084\u662f NoSQL \u74b0\u5883\u4e2d\u3002\u901a\u904e\u4f7f\u7528\u9069\u7576\u7684\u67e5\u8a62\u8a9e\u53e5\u548c\u8003\u616e\u6642\u5340\u53ca\u6027\u80fd\u554f\u984c\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7372\u53d6\u6240\u9700\u7684\u6642\u9593\u6233\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u67e5\u627e\u6700\u8fd1\u7684\u6642\u9593\uff0c\u4f7f\u7528SQL\u67e5\u8a62\u7372\u53d6\u7576\u524d\u6642\u9593\u7684\u6700\u65b0\u8a18\u9304\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\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-179814","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179814","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=179814"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179814\/revisions"}],"predecessor-version":[{"id":179815,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179814\/revisions\/179815"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}