{"id":174607,"date":"2024-11-07T22:44:58","date_gmt":"2024-11-07T14:44:58","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174607\/"},"modified":"2024-11-07T22:44:59","modified_gmt":"2024-11-07T14:44:59","slug":"%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84%e5%88%97%e6%95%b8%ef%bc%9f-%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84%e5%88%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174607\/","title":{"rendered":"\u5982\u4f55\u5feb\u901f\u7372\u53d6\u6578\u64da\u5eab\u8868\u7684\u5217\u6578\uff1f (\u7372\u53d6\u6578\u64da\u5eab\u8868\u7684\u5217\u6578)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%bf%ab%e9%80%9f%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84%e5%88%97%e6%95%b8%ef%bc%9f-gqyHDMwfwt\">\u5982\u4f55\u5feb\u901f\u7372\u53d6\u6578\u64da\u5eab\u8868\u7684\u5217\u6578\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u4e86\u89e3\u8868\u7684\u7d50\u69cb\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5c24\u5176\u662f\u7576\u6211\u5011\u9700\u8981\u9032\u884c\u6578\u64da\u67e5\u8a62\u6216\u6578\u64da\u5206\u6790\u6642\u3002\u7372\u53d6\u6578\u64da\u5eab\u8868\u7684\u5217\u6578\u662f\u4e00\u500b\u57fa\u672c\u4f46\u95dc\u9375\u7684\u64cd\u4f5c\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u7a2e\u5feb\u901f\u7372\u53d6\u6578\u64da\u5eab\u8868\u5217\u6578\u7684\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sql-%e6%9f%a5%e8%a9%a2%e7%8d%b2%e5%8f%96%e5%88%97%e6%95%b8-gqyHDMwfwt\">\u4f7f\u7528 SQL \u67e5\u8a62\u7372\u53d6\u5217\u6578<\/h2>\n<p>\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u7372\u53d6\u8868\u7684\u5217\u6578\u3002\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u6709\u4e0d\u540c\u7684\u67e5\u8a62\u8a9e\u6cd5\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u6578\u64da\u5eab\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"mysql-gqyHDMwfwt\">MySQL<\/h3>\n<pre><code>SELECT COUNT(*) \nFROM information_schema.COLUMNS \nWHERE TABLE_NAME = 'your_table_name' \nAND TABLE_SCHEMA = 'your_database_name';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u5f9e <code>information_schema.COLUMNS<\/code> \u8868\u4e2d\u9078\u64c7\u5217\uff0c\u4e26\u4f7f\u7528 <code>COUNT(*)<\/code> \u51fd\u6578\u4f86\u8a08\u7b97\u6307\u5b9a\u8868\u7684\u5217\u6578\u3002\u8acb\u5c07 <code>your_table_name<\/code> \u548c <code>your_database_name<\/code> \u66ff\u63db\u70ba\u5be6\u969b\u7684\u8868\u540d\u548c\u6578\u64da\u5eab\u540d\u3002<\/p>\n<h3 id=\"postgresql-gqyHDMwfwt\">PostgreSQL<\/h3>\n<pre><code>SELECT COUNT(*) \nFROM information_schema.columns \nWHERE table_name = 'your_table_name';<\/code><\/pre>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u6211\u5011\u540c\u6a23\u53ef\u4ee5\u4f7f\u7528 <code>information_schema.columns<\/code> \u4f86\u7372\u53d6\u5217\u6578\u3002\u9019\u500b\u67e5\u8a62\u4e0d\u9700\u8981\u6307\u5b9a\u6578\u64da\u5eab\u540d\uff0c\u56e0\u70ba\u5b83\u6703\u5728\u7576\u524d\u6578\u64da\u5eab\u4e2d\u67e5\u627e\u3002<\/p>\n<h3 id=\"sql-server-gqyHDMwfwt\">SQL Server<\/h3>\n<pre><code>SELECT COUNT(*) \nFROM INFORMATION_SCHEMA.COLUMNS \nWHERE TABLE_NAME = 'your_table_name';<\/code><\/pre>\n<p>SQL Server \u7684\u67e5\u8a62\u8207 PostgreSQL \u985e\u4f3c\uff0c\u4f7f\u7528 <code>INFORMATION_SCHEMA.COLUMNS<\/code> \u4f86\u7372\u53d6\u5217\u6578\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ae%a1%e7%90%86%e5%b7%a5%e5%85%b7-gqyHDMwfwt\">\u4f7f\u7528\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528 SQL \u67e5\u8a62\u5916\uff0c\u8a31\u591a\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\uff08\u5982 phpMyAdmin\u3001DBeaver\u3001Navicat \u7b49\uff09\u4e5f\u63d0\u4f9b\u4e86\u53ef\u8996\u5316\u754c\u9762\u4f86\u67e5\u770b\u8868\u7684\u7d50\u69cb\u3002\u5728\u9019\u4e9b\u5de5\u5177\u4e2d\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u627e\u5230\u8868\u7684\u5217\u6578\u548c\u5176\u4ed6\u76f8\u95dc\u4fe1\u606f\u3002<\/p>\n<ul>\n<li><strong>phpMyAdmin\uff1a<\/strong> \u5728\u5de6\u5074\u5c0e\u822a\u6b04\u4e2d\u9078\u64c7\u6578\u64da\u5eab\uff0c\u7136\u5f8c\u9ede\u64ca\u8868\u540d\uff0c\u60a8\u5c07\u770b\u5230\u8868\u7684\u7d50\u69cb\uff0c\u5305\u62ec\u5217\u7684\u6578\u91cf\u3002<\/li>\n<li><strong>DBeaver\uff1a<\/strong> \u53f3\u9375\u9ede\u64ca\u8868\u540d\uff0c\u9078\u64c7\u201c\u67e5\u770b\u5c6c\u6027\u201d\uff0c\u5728\u201c\u5217\u201d\u9078\u9805\u5361\u4e2d\u53ef\u4ee5\u770b\u5230\u6240\u6709\u5217\u7684\u8a73\u7d30\u4fe1\u606f\u3002<\/li>\n<li><strong>Navicat\uff1a<\/strong> \u9078\u64c7\u8868\u5f8c\uff0c\u9ede\u64ca\u201c\u8a2d\u8a08\u201d\u6309\u9215\uff0c\u60a8\u5c07\u770b\u5230\u8868\u7684\u6240\u6709\u5217\u53ca\u5176\u5c6c\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%b7%a8%e7%a8%8b%e8%aa%9e%e8%a8%80%e7%8d%b2%e5%8f%96%e5%88%97%e6%95%b8-gqyHDMwfwt\">\u4f7f\u7528\u7de8\u7a0b\u8a9e\u8a00\u7372\u53d6\u5217\u6578<\/h2>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\uff0c\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7de8\u7a0b\u8a9e\u8a00\u4f86\u7372\u53d6\u8868\u7684\u5217\u6578\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Python \u548c SQLAlchemy \u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>from sqlalchemy import create_engine, MetaData, Table\n\n# \u5275\u5efa\u6578\u64da\u5eab\u5f15\u64ce\nengine = create_engine('mysql+pymysql:\/\/user:password@localhost\/your_database_name')\n\n# \u52a0\u8f09\u5143\u6578\u64da\nmetadata = MetaData()\ntable = Table('your_table_name', metadata, autoload_with=engine)\n\n# \u7372\u53d6\u5217\u6578\ncolumn_count = len(table.columns)\nprint(f'\u5217\u6578: {column_count}') <\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 SQLAlchemy \u4f86\u9023\u63a5\u6578\u64da\u5eab\u4e26\u7372\u53d6\u8868\u7684\u5217\u6578\u3002\u8acb\u6839\u64da\u60a8\u7684\u6578\u64da\u5eab\u985e\u578b\u548c\u9023\u63a5\u4fe1\u606f\u9032\u884c\u76f8\u61c9\u7684\u4fee\u6539\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gqyHDMwfwt\">\u7e3d\u7d50<\/h2>\n<p>\u7372\u53d6\u6578\u64da\u5eab\u8868\u7684\u5217\u6578\u662f\u4e00\u500b\u57fa\u672c\u4f46\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u7121\u8ad6\u662f\u901a\u904e SQL \u67e5\u8a62\u3001\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u9084\u662f\u7de8\u7a0b\u8a9e\u8a00\uff0c\u90fd\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u3002\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7d50\u69cb\uff0c\u9084\u80fd\u5728\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u4e2d\u63d0\u4f9b\u5fc5\u8981\u7684\u4fe1\u606f\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5feb\u901f\u7372\u53d6\u6578\u64da\u5eab\u8868\u7684\u5217\u6578\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u904e\u7a0b\uff0c\u52a9\u60a8\u8f15\u9b06\u638c\u63e1\u6578\u64da\u7d50\u69cb\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-174607","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174607","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=174607"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174607\/revisions"}],"predecessor-version":[{"id":174608,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174607\/revisions\/174608"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=174607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=174607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=174607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}