{"id":173519,"date":"2024-11-07T18:42:21","date_gmt":"2024-11-07T10:42:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173519\/"},"modified":"2024-11-07T18:42:22","modified_gmt":"2024-11-07T10:42:22","slug":"%e5%a6%82%e4%bd%95%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9c%80%e6%96%b0%e7%9a%84%e8%a8%98%e9%8c%84%e6%99%82%e9%96%93%ef%bc%9f-%e5%a6%82%e4%bd%95%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173519\/","title":{"rendered":"\u5982\u4f55\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u6700\u65b0\u7684\u8a18\u9304\u6642\u9593\uff1f (\u5982\u4f55\u53d6\u6578\u64da\u5eab\u6642\u9593\u6700\u65b0\u7684\u8a18\u9304)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9c%80%e6%96%b0%e7%9a%84%e8%a8%98%e9%8c%84%e6%99%82%e9%96%93%ef%bc%9f-pGakiXDnIx\">\u5982\u4f55\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u6700\u65b0\u7684\u8a18\u9304\u6642\u9593\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\u6642\u9593\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u7528\u65bc\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\uff0c\u9084\u662f\u7cfb\u7d71\u76e3\u63a7\uff0c\u4e86\u89e3\u6578\u64da\u7684\u6700\u65b0\u72c0\u614b\u90fd\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\u6642\u9593\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e8%80%83%e9%87%8f-pGakiXDnIx\">\u6578\u64da\u5eab\u8a2d\u8a08\u8003\u91cf<\/h2>\n<p>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u70ba\u4e86\u80fd\u5920\u65b9\u4fbf\u5730\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\uff0c\u901a\u5e38\u6703\u5728\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u6642\u9593\u6233\u5b57\u6bb5\u3002\u9019\u500b\u5b57\u6bb5\u53ef\u4ee5\u662f\u81ea\u52d5\u751f\u6210\u7684\uff0c\u8a18\u9304\u6bcf\u6b21\u63d2\u5165\u6216\u66f4\u65b0\u7684\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6642\u9593\u6233\u5b57\u6bb5\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>DATETIME<\/strong>: \u7528\u65bc\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u7cbe\u78ba\u5230\u79d2\u3002<\/li>\n<li><strong>TIMESTAMP<\/strong>: \u985e\u4f3c\u65bcDATETIME\uff0c\u4f46\u6703\u96a8\u8457\u6642\u5340\u8b8a\u5316\u800c\u8b8a\u5316\u3002<\/li>\n<li><strong>DATE<\/strong>: \u53ea\u5b58\u5132\u65e5\u671f\uff0c\u4e0d\u5305\u542b\u6642\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9c%a8mysql%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-pGakiXDnIx\">\u5728MySQL\u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528ORDER BY\u5b50\u53e5\u7d50\u5408LIMIT\u4f86\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\u3002\u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba<code>orders<\/code>\u7684\u8868\uff0c\u4e26\u4e14\u6709\u4e00\u500b<code>created_at<\/code>\u5b57\u6bb5\u4f86\u8a18\u9304\u5275\u5efa\u6642\u9593\uff0c\u4ee5\u4e0b\u662f\u67e5\u8a62\u6700\u65b0\u8a18\u9304\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM orders\nORDER BY created_at DESC\nLIMIT 1;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de<code>orders<\/code>\u8868\u4e2d\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e5%9c%a8postgresql%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-pGakiXDnIx\">\u5728PostgreSQL\u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u7372\u53d6\u6700\u65b0\u8a18\u9304\u7684\u65b9\u5f0f\u8207MySQL\u985e\u4f3c\u3002\u4f7f\u7528<code>ORDER BY<\/code>\u548c<code>LIMIT<\/code>\u4f86\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u76f8\u61c9\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM orders\nORDER BY created_at DESC\nLIMIT 1;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u540c\u6a23\u6703\u8fd4\u56de\u6700\u65b0\u7684\u4e00\u689d\u8a02\u55ae\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e5%9c%a8sql-server%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-pGakiXDnIx\">\u5728SQL Server\u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>TOP<\/code>\u95dc\u9375\u5b57\u4f86\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u6700\u65b0\u8a18\u9304\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT TOP 1 * FROM orders\nORDER BY created_at DESC;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de<code>orders<\/code>\u8868\u4e2d\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\uff0c\u8207\u524d\u9762\u7684\u4f8b\u5b50\u985e\u4f3c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84%e6%99%82%e9%96%93-pGakiXDnIx\">\u4f7f\u7528\u805a\u5408\u51fd\u6578\u7372\u53d6\u6700\u65b0\u8a18\u9304\u6642\u9593<\/h2>\n<p>\u9664\u4e86\u76f4\u63a5\u67e5\u8a62\u6700\u65b0\u7684\u8a18\u9304\u5916\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528\u805a\u5408\u51fd\u6578\u4f86\u7372\u53d6\u6700\u65b0\u7684\u8a18\u9304\u6642\u9593\u3002\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u7372\u53d6\u6700\u65b0\u7684\u5275\u5efa\u6642\u9593\uff1a<\/p>\n<pre><code>SELECT MAX(created_at) AS latest_time FROM orders;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de<code>orders<\/code>\u8868\u4e2d\u6700\u65b0\u7684\u5275\u5efa\u6642\u9593\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-pGakiXDnIx\">\u7d50\u8ad6<\/h2>\n<p>\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u6700\u65b0\u7684\u8a18\u9304\u6642\u9593\u662f\u4e00\u500b\u57fa\u672c\u800c\u91cd\u8981\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u4f7f\u7528\u54ea\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u901a\u904e\u9069\u7576\u7684\u67e5\u8a62\u8a9e\u53e5\uff0c\u90fd\u80fd\u5920\u8f15\u9b06\u7372\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u5408\u7406\u5730\u4f7f\u7528\u6642\u9593\u6233\u5b57\u6bb5\u5c07\u6709\u52a9\u65bc\u672a\u4f86\u7684\u6578\u64da\u6aa2\u7d22\u548c\u5206\u6790\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684\u6578\u64da\u5eab\u3002\u7121\u8ad6\u662f\u9700\u8981\u9ad8\u6027\u80fd\u7684<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u9084\u662f\u7a69\u5b9a\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0cServer.HK\u90fd\u80fd\u63d0\u4f9b\u6eff\u8db3\u60a8\u9700\u6c42\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304\u7684\u6642\u9593\uff0c\u638c\u63e1\u6709\u6548\u67e5\u8a62\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\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-173519","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173519","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=173519"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173519\/revisions"}],"predecessor-version":[{"id":173520,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173519\/revisions\/173520"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}