{"id":165381,"date":"2024-11-05T12:00:25","date_gmt":"2024-11-05T04:00:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/165381\/"},"modified":"2024-11-05T12:00:25","modified_gmt":"2024-11-05T04:00:25","slug":"%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b8%85%e7%a9%ba%e6%8a%80%e5%b7%a7%e8%a9%b3%e8%a7%a3-%e5%a6%82%e4%bd%95%e6%b8%85%e7%a9%ba%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/165381\/","title":{"rendered":"\u7a7a\u9593\u6578\u64da\u5eab\u6e05\u7a7a\u6280\u5de7\u8a73\u89e3 (\u5982\u4f55\u6e05\u7a7a\u7a7a\u9593\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b8%85%e7%a9%ba%e6%8a%80%e5%b7%a7%e8%a9%b3%e8%a7%a3-%e5%a6%82%e4%bd%95%e6%b8%85%e7%a9%ba%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab-zGQXyRKOCa\">\u7a7a\u9593\u6578\u64da\u5eab\u6e05\u7a7a\u6280\u5de7\u8a73\u89e3 (\u5982\u4f55\u6e05\u7a7a\u7a7a\u9593\u6578\u64da\u5eab)<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u7dad\u8b77\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7279\u5225\u662f\u5728\u7a7a\u9593\u6578\u64da\u5eab\u4e2d\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5b9a\u671f\u6e05\u7a7a\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u662f\u4fdd\u6301\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u6e05\u7a7a\u7a7a\u9593\u6578\u64da\u5eab\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-zGQXyRKOCa\">\u4ec0\u9ebc\u662f\u7a7a\u9593\u6578\u64da\u5eab\uff1f<\/h2>\n<p>\u7a7a\u9593\u6578\u64da\u5eab\u662f\u4e00\u7a2e\u5c08\u9580\u7528\u65bc\u5b58\u5132\u548c\u7ba1\u7406\u5730\u7406\u7a7a\u9593\u6578\u64da\u7684\u6578\u64da\u5eab\u3002\u9019\u4e9b\u6578\u64da\u901a\u5e38\u5305\u62ec\u5730\u5716\u3001\u5730\u7406\u4fe1\u606f\u7cfb\u7d71\uff08GIS\uff09\u6578\u64da\u3001\u885b\u661f\u5f71\u50cf\u7b49\u3002\u7a7a\u9593\u6578\u64da\u5eab\u7684\u7279\u9ede\u5728\u65bc\u5b83\u80fd\u5920\u8655\u7406\u8907\u96dc\u7684\u7a7a\u9593\u67e5\u8a62\u548c\u5206\u6790\uff0c\u4e26\u652f\u6301\u591a\u7a2e\u6578\u64da\u683c\u5f0f\uff0c\u5982\u77e2\u91cf\u548c\u5149\u67f5\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%b8%85%e7%a9%ba%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-zGQXyRKOCa\">\u70ba\u4ec0\u9ebc\u9700\u8981\u6e05\u7a7a\u7a7a\u9593\u6578\u64da\u5eab\uff1f<\/h2>\n<p>\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u7a7a\u9593\u6578\u64da\u5eab\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u6578\u64da\uff0c\u4f8b\u5982\u904e\u671f\u7684\u5730\u5716\u6578\u64da\u3001\u91cd\u8907\u7684\u8a18\u9304\u6216\u6e2c\u8a66\u6578\u64da\u3002\u9019\u4e9b\u6578\u64da\u4e0d\u50c5\u4f54\u7528\u5b58\u5132\u7a7a\u9593\uff0c\u9084\u53ef\u80fd\u5f71\u97ff\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u67e5\u8a62\u901f\u5ea6\u3002\u56e0\u6b64\uff0c\u5b9a\u671f\u6e05\u7a7a\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"%e6%b8%85%e7%a9%ba%e7%a9%ba%e9%96%93%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%8a%80%e5%b7%a7-zGQXyRKOCa\">\u6e05\u7a7a\u7a7a\u9593\u6578\u64da\u5eab\u7684\u6280\u5de7<\/h2>\n<h3 id=\"1-%e7%a2%ba%e5%ae%9a%e9%9c%80%e8%a6%81%e6%b8%85%e7%a9%ba%e7%9a%84%e6%95%b8%e6%93%9a-zGQXyRKOCa\">1. \u78ba\u5b9a\u9700\u8981\u6e05\u7a7a\u7684\u6578\u64da<\/h3>\n<p>\u5728\u958b\u59cb\u6e05\u7a7a\u6578\u64da\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u54ea\u4e9b\u6578\u64da\u662f\u53ef\u4ee5\u5b89\u5168\u522a\u9664\u7684\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u5f0f\u4f86\u5be6\u73fe\uff1a<\/p>\n<ul>\n<li>\u6aa2\u67e5\u6578\u64da\u7684\u6642\u9593\u6233\uff0c\u522a\u9664\u904e\u671f\u7684\u6578\u64da\u3002<\/li>\n<li>\u8b58\u5225\u91cd\u8907\u7684\u8a18\u9304\uff0c\u4e26\u9078\u64c7\u6027\u5730\u522a\u9664\u3002<\/li>\n<li>\u6839\u64da\u696d\u52d9\u9700\u6c42\uff0c\u78ba\u5b9a\u54ea\u4e9b\u6578\u64da\u4e0d\u518d\u9700\u8981\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8sql%e8%aa%9e%e5%8f%a5%e9%80%b2%e8%a1%8c%e6%b8%85%e7%a9%ba-zGQXyRKOCa\">2. \u4f7f\u7528SQL\u8a9e\u53e5\u9032\u884c\u6e05\u7a7a<\/h3>\n<p>\u5728\u5927\u591a\u6578\u7a7a\u9593\u6578\u64da\u5eab\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u522a\u9664\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u522a\u9664\u904e\u671f\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>DELETE FROM your_table_name\nWHERE timestamp &lt; 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