{"id":152201,"date":"2024-11-01T20:57:23","date_gmt":"2024-11-01T12:57:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152201\/"},"modified":"2024-11-01T20:57:24","modified_gmt":"2024-11-01T12:57:24","slug":"%e4%b8%8d%e8%b6%85%e9%81%8e%e7%99%be%e8%a1%8c%e7%9a%84sql%e6%96%87%e4%bb%b6%e6%8f%90%e5%8f%96%e5%99%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152201\/","title":{"rendered":"\u4e0d\u8d85\u904e\u767e\u884c\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668"},"content":{"rendered":"<h1 id=\"%e4%b8%8d%e8%b6%85%e9%81%8e%e7%99%be%e8%a1%8c%e7%9a%84sql%e6%96%87%e4%bb%b6%e6%8f%90%e5%8f%96%e5%99%a8-bRdFIImGHP\">\u4e0d\u8d85\u904e\u767e\u884c\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\u6587\u4ef6\u63d0\u53d6\u5668\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\u3002\u5b83\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5f9e\u5927\u578b\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u6578\u64da\uff0c\u4e26\u4ee5\u53ef\u8b80\u7684\u683c\u5f0f\u9032\u884c\u5c55\u793a\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5275\u5efa\u4e00\u500b\u4e0d\u8d85\u904e\u767e\u884c\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsql%e6%96%87%e4%bb%b6%e6%8f%90%e5%8f%96%e5%99%a8%ef%bc%9f-bRdFIImGHP\">\u4ec0\u9ebc\u662fSQL\u6587\u4ef6\u63d0\u53d6\u5668\uff1f<\/h2>\n<p>SQL\u6587\u4ef6\u63d0\u53d6\u5668\u662f\u4e00\u7a2e\u7a0b\u5e8f\u6216\u8173\u672c\uff0c\u65e8\u5728\u5f9eSQL\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u3002\u9019\u4e9b\u63d0\u53d6\u7684\u6578\u64da\u53ef\u4ee5\u7528\u65bc\u5831\u544a\u3001\u5206\u6790\u6216\u5176\u4ed6\u61c9\u7528\u3002\u901a\u5e38\uff0c\u9019\u4e9b\u63d0\u53d6\u5668\u6703\u4f7f\u7528SQL\u67e5\u8a62\u4f86\u9078\u64c7\u7279\u5b9a\u7684\u6578\u64da\uff0c\u7136\u5f8c\u5c07\u5176\u683c\u5f0f\u5316\u70ba\u6613\u65bc\u7406\u89e3\u7684\u5f62\u5f0f\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e4%b8%8d%e8%b6%85%e9%81%8e%e7%99%be%e8%a1%8c%e7%9a%84%e6%8f%90%e5%8f%96%e5%99%a8%ef%bc%9f-bRdFIImGHP\">\u70ba\u4ec0\u9ebc\u9700\u8981\u4e0d\u8d85\u904e\u767e\u884c\u7684\u63d0\u53d6\u5668\uff1f<\/h2>\n<p>\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u4eba\u54e1\u548c\u6578\u64da\u5206\u6790\u5e2b\u9700\u8981\u5feb\u901f\u4e14\u9ad8\u6548\u7684\u5de5\u5177\u4f86\u63d0\u53d6\u6578\u64da\u3002\u904e\u65bc\u8907\u96dc\u7684\u4ee3\u78bc\u53ef\u80fd\u6703\u5c0e\u81f4\u7dad\u8b77\u56f0\u96e3\u548c\u6027\u80fd\u554f\u984c\u3002\u56e0\u6b64\uff0c\u5275\u5efa\u4e00\u500b\u7c21\u6f54\u4e14\u9ad8\u6548\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u6a23\u7684\u63d0\u53d6\u5668\u4e0d\u50c5\u6613\u65bc\u7406\u89e3\uff0c\u9084\u80fd\u5920\u5feb\u901f\u57f7\u884c\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-bRdFIImGHP\">\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>\u4e00\u500b\u7c21\u55ae\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u5eab\u9023\u63a5<\/li>\n<li>SQL\u67e5\u8a62<\/li>\n<li>\u6578\u64da\u63d0\u53d6\u548c\u683c\u5f0f\u5316<\/li>\n<li>\u932f\u8aa4\u8655\u7406<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-bRdFIImGHP\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Python\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5275\u5efa\u4e00\u500b\u4e0d\u8d85\u904e\u767e\u884c\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668\uff1a<\/p>\n<pre><code>\nimport sqlite3\n\ndef extract_data(db_file, query):\n    try:\n        # \u9023\u63a5\u5230\u6578\u64da\u5eab\n        conn = sqlite3.connect(db_file)\n        cursor = conn.cursor()\n        \n        # \u57f7\u884c\u67e5\u8a62\n        cursor.execute(query)\n        \n        # \u63d0\u53d6\u6578\u64da\n        rows = cursor.fetchall()\n        \n        # \u683c\u5f0f\u5316\u8f38\u51fa\n        for row in rows:\n            print(row)\n    \n    except sqlite3.Error as e:\n        print(f\"\u6578\u64da\u5eab\u932f\u8aa4: {e}\")\n    \n    finally:\n        if conn:\n            conn.close()\n\n# \u4f7f\u7528\u793a\u4f8b\ndb_file = 'example.db'\nquery = 'SELECT * FROM users WHERE age &gt; 30;'\nextract_data(db_file, query)\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86Python\u7684sqlite3\u5eab\u4f86\u9023\u63a5\u5230SQLite\u6578\u64da\u5eab\uff0c\u57f7\u884c\u67e5\u8a62\u4e26\u63d0\u53d6\u6578\u64da\u3002\u9019\u6bb5\u4ee3\u78bc\u7c21\u6f54\u660e\u4e86\uff0c\u4e26\u4e14\u4e0d\u8d85\u904e\u767e\u884c\uff0c\u9069\u5408\u5feb\u901f\u958b\u767c\u548c\u6e2c\u8a66\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-bRdFIImGHP\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u5275\u5efaSQL\u6587\u4ef6\u63d0\u53d6\u5668\u6642\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u7c21\u6f54\u6027\uff1a<\/strong>\u4fdd\u6301\u4ee3\u78bc\u7c21\u6f54\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8907\u96dc\u6027\u3002<\/li>\n<li><strong>\u932f\u8aa4\u8655\u7406\uff1a<\/strong>\u78ba\u4fdd\u6709\u9069\u7576\u7684\u932f\u8aa4\u8655\u7406\u6a5f\u5236\uff0c\u4ee5\u4fbf\u5728\u51fa\u73fe\u554f\u984c\u6642\u80fd\u5920\u5feb\u901f\u5b9a\u4f4d\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u8003\u616e\u4f7f\u7528\u5206\u9801\u6216\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6578\u91cf\u3002<\/li>\n<li><strong>\u6587\u6a94\u5316\uff1a<\/strong>\u70ba\u4ee3\u78bc\u6dfb\u52a0\u8a3b\u91cb\uff0c\u4ee5\u4fbf\u5176\u4ed6\u958b\u767c\u4eba\u54e1\u80fd\u5920\u7406\u89e3\u5176\u529f\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-bRdFIImGHP\">\u7d50\u8ad6<\/h2>\n<p>\u4e0d\u8d85\u904e\u767e\u884c\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668\u662f\u4e00\u500b\u5be6\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u63d0\u53d6\u548c\u5206\u6790\u6578\u64da\u3002\u901a\u904e\u7c21\u6f54\u7684\u4ee3\u78bc\u7d50\u69cb\u548c\u6709\u6548\u7684\u932f\u8aa4\u8655\u7406\uff0c\u9019\u6a23\u7684\u63d0\u53d6\u5668\u4e0d\u50c5\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\uff0c\u9084\u80fd\u964d\u4f4e\u7dad\u8b77\u6210\u672c\u3002\u5c0d\u65bc\u9700\u8981\u7d93\u5e38\u8655\u7406\u6578\u64da\u7684\u958b\u767c\u4eba\u54e1\u548c\u5206\u6790\u5e2b\u4f86\u8aaa\uff0c\u638c\u63e1\u9019\u7a2e\u5de5\u5177\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u7ba1\u7406\u6709\u8208\u8da3\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u5feb\u7684\u6578\u64da\u5b58\u53d6\u901f\u5ea6\u548c\u66f4\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7c21\u55ae\u6613\u7528\u7684SQL\u6587\u4ef6\u63d0\u53d6\u5668\uff0c\u8f15\u9b06\u63d0\u53d6\u4e0d\u8d85\u904e\u767e\u884c\u7684SQL\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u9069\u5408\u5404\u985e\u7528\u6236\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-152201","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152201","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=152201"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152201\/revisions"}],"predecessor-version":[{"id":152202,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152201\/revisions\/152202"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}