{"id":64484,"date":"2024-10-14T11:26:16","date_gmt":"2024-10-14T03:26:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/64484\/"},"modified":"2024-10-14T11:26:16","modified_gmt":"2024-10-14T03:26:16","slug":"msq%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e9%bb%98%e8%aa%8d%e8%a8%98%e9%8c%84%e7%b3%bb%e7%b5%b1%e6%99%82%e9%96%93%ef%bc%8c%e9%ab%98%e6%95%88%e7%ae%a1%e7%90%86%e6%95%b8%e6%93%9a-msq%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/64484\/","title":{"rendered":"MSQ\u6578\u64da\u5eab\u5b57\u6bb5\u9ed8\u8a8d\u8a18\u9304\u7cfb\u7d71\u6642\u9593\uff0c\u9ad8\u6548\u7ba1\u7406\u6578\u64da (msq\u6578\u64da\u5eab\u5b57\u6bb5\u9ed8\u8a8d\u7cfb\u7d71\u6642\u9593)"},"content":{"rendered":"<h1 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id=\"%e5%a6%82%e4%bd%95%e5%9c%a8msq%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e7%b3%bb%e7%b5%b1%e6%99%82%e9%96%93-EVYmnprnmv\">\u5982\u4f55\u5728MSQ\u6578\u64da\u5eab\u4e2d\u8a2d\u7f6e\u9ed8\u8a8d\u7cfb\u7d71\u6642\u9593<\/h2>\n<p>\u5728MSQ\u6578\u64da\u5eab\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u70ba\u7576\u524d\u6642\u9593\u4f86\u5be6\u73fe\u81ea\u52d5\u8a18\u9304\u7cfb\u7d71\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u8a2d\u7f6e\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%a0%bc%e6%99%82%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc-EVYmnprnmv\">1. \u5275\u5efa\u8868\u683c\u6642\u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/h3>\n<pre><code>CREATE TABLE orders (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    order_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,\n    customer_id INT,\n    total DECIMAL(10, 2)\n);<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u7576\u4e00\u500b\u65b0\u8a02\u55ae\u88ab\u5275\u5efa\u6642\uff0c`order_date`\u5b57\u6bb5\u5c07\u81ea\u52d5\u586b\u5145\u70ba\u7576\u524d\u7684\u7cfb\u7d71\u6642\u9593\u3002<\/p>\n<h3 id=\"2-%e6%9b%b4%e6%96%b0%e8%a8%98%e9%8c%84%e6%99%82%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc-EVYmnprnmv\">2. \u66f4\u65b0\u8a18\u9304\u6642\u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/h3>\n<p>\u9664\u4e86\u5275\u5efa\u6642\u8a18\u9304\u7cfb\u7d71\u6642\u9593\uff0c\u9084\u53ef\u4ee5\u5728\u66f4\u65b0\u8a18\u9304\u6642\u81ea\u52d5\u8a18\u9304\u6642\u9593\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528`ON UPDATE`\u8a9e\u53e5\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>CREATE TABLE orders (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    order_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,\n    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,\n    customer_id INT,\n    total DECIMAL(10, 2)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`updated_at`\u5b57\u6bb5\u5c07\u5728\u6bcf\u6b21\u66f4\u65b0\u6642\u81ea\u52d5\u66f4\u65b0\u70ba\u7576\u524d\u7684\u7cfb\u7d71\u6642\u9593\u3002<\/p>\n<h2 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