{"id":185494,"date":"2024-11-10T22:02:17","date_gmt":"2024-11-10T14:02:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185494\/"},"modified":"2024-11-10T22:02:17","modified_gmt":"2024-11-10T14:02:17","slug":"%e4%bd%bf%e7%94%a8%e5%be%aa%e7%92%b0%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%ef%bc%8c%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86%e5%92%8c%e5%88%86%e6%9e%90%ef%bc%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185494\/","title":{"rendered":"\u4f7f\u7528\u5faa\u74b0\u7372\u53d6\u6578\u64da\u5eab\u6578\u64da\uff0c\u5be6\u73fe\u6578\u64da\u8655\u7406\u548c\u5206\u6790\uff08\u5f9e\u6578\u64da\u5eab\u5faa\u74b0\u7372\u5f97\u6578\u64da\u5eab\u6578\u64da\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8%e5%be%aa%e7%92%b0%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%ef%bc%8c%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86%e5%92%8c%e5%88%86%e6%9e%90-sxtLdcRAdJ\">\u4f7f\u7528\u5faa\u74b0\u7372\u53d6\u6578\u64da\u5eab\u6578\u64da\uff0c\u5be6\u73fe\u6578\u64da\u8655\u7406\u548c\u5206\u6790<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\uff0c\u6578\u64da\u7684\u6536\u96c6\u3001\u8655\u7406\u548c\u5206\u6790\u90fd\u662f\u6c7a\u7b56\u904e\u7a0b\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528\u5faa\u74b0\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u9032\u884c\u6709\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%be%aa%e7%92%b0%e7%8d%b2%e5%8f%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-sxtLdcRAdJ\">\u6578\u64da\u5eab\u5faa\u74b0\u7372\u53d6\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5faa\u74b0\u7372\u53d6\u6578\u64da\u5eab\u6578\u64da\u662f\u6307\u901a\u904e\u7de8\u7a0b\u8a9e\u8a00\uff08\u5982Python\u3001Java\u7b49\uff09\u4f7f\u7528\u5faa\u74b0\u7d50\u69cb\u4f86\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u5e38\u6d89\u53ca\u5230\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li id=\"%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-sxtLdcRAdJ\">\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/li>\n<li id=\"%e5%9f%b7%e8%a1%8c%e6%9f%a5%e8%a9%a2%e4%bb%a5%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a-sxtLdcRAdJ\">\u57f7\u884c\u67e5\u8a62\u4ee5\u7372\u53d6\u6578\u64da<\/li>\n<li id=\"%e4%bd%bf%e7%94%a8%e5%be%aa%e7%92%b0%e7%b5%90%e6%a7%8b%e9%81%8d%e6%ad%b7%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-sxtLdcRAdJ\">\u4f7f\u7528\u5faa\u74b0\u7d50\u69cb\u904d\u6b77\u67e5\u8a62\u7d50\u679c<\/li>\n<li>\u5c0d\u6578\u64da\u9032\u884c\u8655\u7406\u548c\u5206\u6790<\/li>\n<\/ul>\n<h2 id=\"%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-sxtLdcRAdJ\">\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5728\u958b\u59cb\u5faa\u74b0\u7372\u53d6\u6578\u64da\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Python\u7684\u793a\u4f8b\u4ee3\u78bc\uff0c\u5c55\u793a\u5982\u4f55\u9023\u63a5\u5230MySQL\u6578\u64da\u5eab\uff1a<\/p>\n<pre><code>import mysql.connector\n\n# \u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\ndb = mysql.connector.connect(\n    host=\"localhost\",\n    user=\"yourusername\",\n    password=\"yourpassword\",\n    database=\"yourdatabase\"\n)\n\ncursor = db.cursor()\n<\/code><\/pre>\n<h2 id=\"%e5%9f%b7%e8%a1%8c%e6%9f%a5%e8%a9%a2%e4%bb%a5%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a-sxtLdcRAdJ\">\u57f7\u884c\u67e5\u8a62\u4ee5\u7372\u53d6\u6578\u64da<\/h2>\n<p>\u4e00\u65e6\u9023\u63a5\u5efa\u7acb\uff0c\u5c31\u53ef\u4ee5\u57f7\u884cSQL\u67e5\u8a62\u4f86\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u78bc\u5c07\u5f9e\u540d\u70ba\u201cemployees\u201d\u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u8a18\u9304\uff1a<\/p>\n<pre><code>query = \"SELECT * FROM employees\"\ncursor.execute(query)\nresults = cursor.fetchall()\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%be%aa%e7%92%b0%e7%b5%90%e6%a7%8b%e9%81%8d%e6%ad%b7%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-sxtLdcRAdJ\">\u4f7f\u7528\u5faa\u74b0\u7d50\u69cb\u904d\u6b77\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u7372\u53d6\u6578\u64da\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u5faa\u74b0\u7d50\u69cb\u4f86\u904d\u6b77\u67e5\u8a62\u7d50\u679c\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528for\u5faa\u74b0\u4f86\u904d\u6b77\u7d50\u679c\u4e26\u6253\u5370\u6bcf\u4e00\u884c\uff1a<\/p>\n<pre><code>for row in results:\n    print(row)\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u9010\u884c\u8655\u7406\u6578\u64da\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u9032\u4e00\u6b65\u7684\u5206\u6790\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86%e5%92%8c%e5%88%86%e6%9e%90-sxtLdcRAdJ\">\u6578\u64da\u8655\u7406\u548c\u5206\u6790<\/h2>\n<p>\u5728\u7372\u53d6\u6578\u64da\u4e26\u904d\u6b77\u5f8c\uff0c\u53ef\u4ee5\u9032\u884c\u5404\u7a2e\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8a08\u7b97\u67d0\u4e9b\u5b57\u6bb5\u7684\u5e73\u5747\u503c\u3001\u7e3d\u548c\u6216\u5176\u4ed6\u7d71\u8a08\u6307\u6a19\u3002\u4ee5\u4e0b\u662f\u8a08\u7b97\u201csalary\u201d\u5b57\u6bb5\u5e73\u5747\u503c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>total_salary = 0\ncount = 0\n\nfor row in results:\n    total_salary += row[2]  # \u5047\u8a2d\u85aa\u6c34\u5728\u7b2c\u4e09\u5217\n    count += 1\n\naverage_salary = total_salary \/ count\nprint(\"Average Salary:\", average_salary)\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-sxtLdcRAdJ\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528\u5faa\u74b0\u7372\u53d6\u6578\u64da\u5eab\u6578\u64da\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u5206\u6790\u65b9\u6cd5\u3002\u901a\u904e\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\u3001\u57f7\u884c\u67e5\u8a62\u3001\u904d\u6b77\u7d50\u679c\u4ee5\u53ca\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u50f9\u503c\u7684\u4fe1\u606f\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u52a0\uff0c\u9019\u7a2e\u65b9\u6cd5\u7684\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u4f7f\u5176\u6210\u70ba\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u7684\u9996\u9078\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u5206\u6790\uff0c<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528\u5faa\u74b0\u5f9e\u6578\u64da\u5eab\u7372\u53d6\u6578\u64da\uff0c\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u548c\u5206\u6790\uff0c\u63d0\u5347\u696d\u52d9\u6c7a\u7b56\u7684\u6e96\u78ba\u6027\u548c\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-185494","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185494","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=185494"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185494\/revisions"}],"predecessor-version":[{"id":185495,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185494\/revisions\/185495"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}