{"id":173521,"date":"2024-11-07T18:43:19","date_gmt":"2024-11-07T10:43:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173521\/"},"modified":"2024-11-07T18:43:20","modified_gmt":"2024-11-07T10:43:20","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%e4%b8%80%e6%a2%9d%e8%a8%98%e9%8c%84%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-%e5%8f%96%e6%99%82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173521\/","title":{"rendered":"\u5982\u4f55\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\uff1f (\u6578\u64da\u5eab \u53d6\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%e4%b8%80%e6%a2%9d%e8%a8%98%e9%8c%84%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-%e5%8f%96%e6%99%82-ILkFTcBSbm\">\u5982\u4f55\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\uff1f (\u6578\u64da\u5eab \u53d6\u6642\u9593\u6700\u65b0\u7684\u8a18\u9304)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7372\u53d6\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u7528\u65bc\u986f\u793a\u6700\u65b0\u7684\u7528\u6236\u6d3b\u52d5\u3001\u6700\u65b0\u7684\u8a02\u55ae\uff0c\u9084\u662f\u6700\u65b0\u7684\u65e5\u8a8c\u4fe1\u606f\uff0c\u9019\u4e00\u64cd\u4f5c\u90fd\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u5feb\u901f\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u7372\u53d6\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\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-ILkFTcBSbm\">\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\u8a2d\u7f6e\u4e00\u500b\u6642\u9593\u6233\u5b57\u6bb5\u3002\u9019\u500b\u5b57\u6bb5\u53ef\u4ee5\u662f\u5275\u5efa\u6642\u9593\uff08created_at\uff09\u6216\u66f4\u65b0\u6642\u9593\uff08updated_at\uff09\uff0c\u7528\u65bc\u8a18\u9304\u6bcf\u689d\u8a18\u9304\u7684\u6642\u9593\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u8868\u7d50\u69cb\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE orders (\n    id INT PRIMARY KEY AUTO_INCREMENT,\n    user_id INT,\n    order_date DATETIME DEFAULT CURRENT_TIMESTAMP,\n    amount DECIMAL(10, 2)\n);<\/code><\/pre>\n<h2 id=\"%e5%9c%a8-mysql-%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-ILkFTcBSbm\">\u5728 MySQL \u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\u7d50\u5408 <code>LIMIT<\/code> \u4f86\u7372\u53d6\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u6700\u65b0\u8a02\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM orders\nORDER BY order_date DESC\nLIMIT 1;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u6839\u64da <code>order_date<\/code> \u5b57\u6bb5\u7684\u503c\u9032\u884c\u964d\u5e8f\u6392\u5e8f\uff0c\u4e26\u8fd4\u56de\u6700\u65b0\u7684\u4e00\u689d\u8a02\u55ae\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e5%9c%a8-postgresql-%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-ILkFTcBSbm\">\u5728 PostgreSQL \u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>PostgreSQL \u7684\u67e5\u8a62\u65b9\u5f0f\u8207 MySQL \u985e\u4f3c\uff0c\u540c\u6a23\u53ef\u4ee5\u4f7f\u7528 <code>ORDER BY<\/code> \u548c <code>LIMIT<\/code>\u3002\u4ee5\u4e0b\u662f\u76f8\u61c9\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM orders\nORDER BY order_date DESC\nLIMIT 1;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6700\u65b0\u7684\u8a02\u55ae\u8a18\u9304\uff0c\u8207 MySQL \u7684\u7528\u6cd5\u5e7e\u4e4e\u76f8\u540c\u3002<\/p>\n<h2 id=\"%e5%9c%a8-sql-server-%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-ILkFTcBSbm\">\u5728 SQL Server \u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>TOP<\/code> \u95dc\u9375\u5b57\u4f86\u7372\u53d6\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT TOP 1 * FROM orders\nORDER BY order_date DESC;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6700\u65b0\u7684\u8a02\u55ae\uff0c\u4e26\u4e14\u4f7f\u7528\u4e86 <code>TOP<\/code> \u4f86\u9650\u5236\u8fd4\u56de\u7684\u8a18\u9304\u6578\u91cf\u3002<\/p>\n<h2 id=\"%e5%9c%a8-sqlite-%e4%b8%ad%e7%8d%b2%e5%8f%96%e6%9c%80%e6%96%b0%e8%a8%98%e9%8c%84-ILkFTcBSbm\">\u5728 SQLite \u4e2d\u7372\u53d6\u6700\u65b0\u8a18\u9304<\/h2>\n<p>SQLite \u7684\u67e5\u8a62\u65b9\u5f0f\u4e5f\u8207 MySQL \u548c PostgreSQL \u985e\u4f3c\uff0c\u4f7f\u7528 <code>ORDER BY<\/code> \u548c <code>LIMIT<\/code> \u4f86\u7372\u53d6\u6700\u65b0\u8a18\u9304\uff1a<\/p>\n<pre><code>SELECT * FROM orders\nORDER BY order_date DESC\nLIMIT 1;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-ILkFTcBSbm\">\u7d50\u8ad6<\/h2>\n<p>\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u6700\u65b0\u7684\u4e00\u689d\u8a18\u9304\u662f\u4e00\u500b\u57fa\u672c\u800c\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u7121\u8ad6\u4f7f\u7528\u54ea\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u901a\u5e38\u90fd\u53ef\u4ee5\u901a\u904e\u6392\u5e8f\u548c\u9650\u5236\u8fd4\u56de\u7684\u8a18\u9304\u6578\u91cf\u4f86\u5be6\u73fe\u3002\u8a2d\u8a08\u826f\u597d\u7684\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u7279\u5225\u662f\u6642\u9593\u6233\u5b57\u6bb5\u7684\u4f7f\u7528\uff0c\u5c07\u4f7f\u9019\u4e00\u64cd\u4f5c\u66f4\u52a0\u9ad8\u6548\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\u61c9\u7528\u7a0b\u5e8f\uff0c\u9019\u5c07\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6578\u64da\u5b58\u53d6\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u6700\u65b0\u4e00\u689d\u8a18\u9304\uff0c\u638c\u63e1\u4f7f\u7528\u6642\u9593\u6233\u6216\u6392\u5e8f\u67e5\u8a62\u7684\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-173521","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173521","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=173521"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173521\/revisions"}],"predecessor-version":[{"id":173522,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173521\/revisions\/173522"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}