{"id":165949,"date":"2024-11-05T14:12:22","date_gmt":"2024-11-05T06:12:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/165949\/"},"modified":"2024-11-05T14:12:22","modified_gmt":"2024-11-05T06:12:22","slug":"%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%ef%bc%8c%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%ef%bc%9a%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e6%89%80%e6%9c%89%e5%a4%96%e9%8d%b5%e6%96%b9%e6%b3%95-%e5%88%aa","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/165949\/","title":{"rendered":"\u5feb\u901f\u9ad8\u6548\uff0c\u8f15\u9b06\u5be6\u73fe\uff1a\u522a\u9664\u6578\u64da\u5eab\u6240\u6709\u5916\u9375\u65b9\u6cd5 (\u522a\u9664\u6578\u64da\u5eab\u6240\u6709\u5916\u9375)"},"content":{"rendered":"<h1 id=\"%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%ef%bc%8c%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%ef%bc%9a%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e6%89%80%e6%9c%89%e5%a4%96%e9%8d%b5%e6%96%b9%e6%b3%95-sSzWgzdpyP\">\u5feb\u901f\u9ad8\u6548\uff0c\u8f15\u9b06\u5be6\u73fe\uff1a\u522a\u9664\u6578\u64da\u5eab\u6240\u6709\u5916\u9375\u65b9\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5916\u9375\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u7d04\u675f\u689d\u4ef6\uff0c\u7528\u65bc\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u95dc\u806f\u6027\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u5916\u9375\u7d04\u675f\uff0c\u4f8b\u5982\u5728\u9032\u884c\u6578\u64da\u9077\u79fb\u6216\u91cd\u69cb\u6642\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u7a2e\u5feb\u901f\u9ad8\u6548\u7684\u65b9\u6cd5\u4f86\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u5916\u9375\u7d04\u675f\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%a4%96%e9%8d%b5%ef%bc%9f-sSzWgzdpyP\">\u4ec0\u9ebc\u662f\u5916\u9375\uff1f<\/h2>\n<p>\u5916\u9375\u662f\u4e00\u7a2e\u7d04\u675f\uff0c\u7528\u65bc\u5728\u5169\u500b\u8868\u4e4b\u9593\u5efa\u7acb\u95dc\u806f\u3002\u5b83\u78ba\u4fdd\u4e00\u500b\u8868\u4e2d\u7684\u67d0\u500b\u5b57\u6bb5\u7684\u503c\u5fc5\u9808\u5b58\u5728\u65bc\u53e6\u4e00\u500b\u8868\u4e2d\u3002\u9019\u6a23\u7684\u7d04\u675f\u6709\u52a9\u65bc\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u201c\u8a02\u55ae\u201d\u8868\u548c\u4e00\u500b\u201c\u5ba2\u6236\u201d\u8868\uff0c\u8a02\u55ae\u8868\u4e2d\u7684\u201c\u5ba2\u6236ID\u201d\u5b57\u6bb5\u53ef\u4ee5\u8a2d\u7f6e\u70ba\u5916\u9375\uff0c\u6307\u5411\u5ba2\u6236\u8868\u4e2d\u7684\u201cID\u201d\u5b57\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%aa%e9%99%a4%e5%a4%96%e9%8d%b5%ef%bc%9f-sSzWgzdpyP\">\u70ba\u4ec0\u9ebc\u9700\u8981\u522a\u9664\u5916\u9375\uff1f<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u522a\u9664\u5916\u9375\u7d04\u675f\u662f\u5fc5\u8981\u7684\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u5eab\u7d50\u69cb\u7684\u8b8a\u66f4\uff1a\u7576\u60a8\u9700\u8981\u91cd\u69cb\u6578\u64da\u5eab\u6642\uff0c\u53ef\u80fd\u9700\u8981\u522a\u9664\u73fe\u6709\u7684\u5916\u9375\u7d04\u675f\u3002<\/li>\n<li>\u6578\u64da\u9077\u79fb\uff1a\u5728\u5c07\u6578\u64da\u5f9e\u4e00\u500b\u6578\u64da\u5eab\u9077\u79fb\u5230\u53e6\u4e00\u500b\u6578\u64da\u5eab\u6642\uff0c\u53ef\u80fd\u9700\u8981\u66ab\u6642\u522a\u9664\u5916\u9375\u7d04\u675f\u3002<\/li>\n<li>\u6027\u80fd\u8003\u91cf\uff1a\u5728\u9032\u884c\u5927\u91cf\u6578\u64da\u63d2\u5165\u6216\u66f4\u65b0\u6642\uff0c\u5916\u9375\u7d04\u675f\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u9019\u6642\u53ef\u4ee5\u8003\u616e\u66ab\u6642\u522a\u9664\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%88%aa%e9%99%a4%e6%89%80%e6%9c%89%e5%a4%96%e9%8d%b5%e7%9a%84%e6%96%b9%e6%b3%95-sSzWgzdpyP\">\u522a\u9664\u6240\u6709\u5916\u9375\u7684\u65b9\u6cd5<\/h2>\n<p>\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u522a\u9664\u6578\u64da\u5eab\u4e2d\u6240\u6709\u5916\u9375\u7d04\u675f\u7684\u65b9\u6cd5\uff0c\u9019\u4e9b\u65b9\u6cd5\u9069\u7528\u65bc\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u3002<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-sql-%e8%aa%9e%e5%8f%a5-sSzWgzdpyP\">1. \u4f7f\u7528 SQL \u8a9e\u53e5<\/h3>\n<p>\u5c0d\u65bc\u5927\u591a\u6578\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u522a\u9664\u5916\u9375\u7d04\u675f\u3002\u4ee5\u4e0b\u662f MySQL \u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT CONCAT('ALTER TABLE ', TABLE_NAME, ' DROP FOREIGN KEY ', CONSTRAINT_NAME, ';')\nFROM information_schema.KEY_COLUMN_USAGE\nWHERE REFERENCED_TABLE_NAME IS NOT NULL\nAND TABLE_SCHEMA = 'your_database_name';<\/code><\/pre>\n<p>\u9019\u6bb5 SQL \u8a9e\u53e5\u5c07\u751f\u6210\u522a\u9664\u6240\u6709\u5916\u9375\u7d04\u675f\u7684 ALTER TABLE \u8a9e\u53e5\u3002\u60a8\u53ea\u9700\u5c07\u751f\u6210\u7684\u8a9e\u53e5\u57f7\u884c\u5373\u53ef\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%85%b3%e6%9c%ac%e8%87%aa%e5%8b%95%e5%8c%96-sSzWgzdpyP\">2. \u4f7f\u7528\u8173\u672c\u81ea\u52d5\u5316<\/h3>\n<p>\u5982\u679c\u60a8\u9700\u8981\u7d93\u5e38\u522a\u9664\u5916\u9375\u7d04\u675f\uff0c\u53ef\u4ee5\u8003\u616e\u7de8\u5beb\u4e00\u500b\u8173\u672c\u4f86\u81ea\u52d5\u5316\u9019\u4e00\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Python \u548c SQLAlchemy \u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>from sqlalchemy import create_engine, MetaData\n\nengine = create_engine('mysql+pymysql:\/\/user:password@localhost\/your_database_name')\nmetadata = MetaData(bind=engine)\nmetadata.reflect()\n\nfor table in metadata.sorted_tables:\n    for constraint in table.constraints:\n        if constraint.name.startswith('fk_'):\n            print(f'Dropping foreign key {constraint.name} from table {table.name}')\n            engine.execute(f'ALTER TABLE {table.name} DROP FOREIGN KEY {constraint.name};')<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u904d\u6b77\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u8868\uff0c\u4e26\u522a\u9664\u4ee5\u201cfk_\u201d\u958b\u982d\u7684\u5916\u9375\u7d04\u675f\u3002<\/p>\n<h3 id=\"3-%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-sSzWgzdpyP\">3. \u4f7f\u7528\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177<\/h3>\n<p>\u8a31\u591a\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\uff08\u5982 phpMyAdmin\u3001Navicat \u7b49\uff09\u63d0\u4f9b\u4e86\u5716\u5f62\u754c\u9762\u4f86\u7ba1\u7406\u5916\u9375\u7d04\u675f\u3002\u60a8\u53ef\u4ee5\u901a\u904e\u9019\u4e9b\u5de5\u5177\u8f15\u9b06\u5730\u522a\u9664\u5916\u9375\uff0c\u800c\u7121\u9700\u7de8\u5beb\u4efb\u4f55\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-sSzWgzdpyP\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u522a\u9664\u5916\u9375\u7d04\u675f\u4e4b\u524d\uff0c\u8acb\u52d9\u5fc5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u60a8\u4e86\u89e3\u522a\u9664\u5916\u9375\u53ef\u80fd\u5c0d\u6578\u64da\u5b8c\u6574\u6027\u9020\u6210\u7684\u5f71\u97ff\u3002<\/li>\n<li>\u5728\u9032\u884c\u4efb\u4f55\u66f4\u6539\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u6578\u64da\u5eab\u3002<\/li>\n<li>\u5728\u522a\u9664\u5916\u9375\u5f8c\uff0c\u8acb\u6aa2\u67e5\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u78ba\u4fdd\u6c92\u6709\u5b64\u7acb\u7684\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-sSzWgzdpyP\">\u7e3d\u7d50<\/h2>\n<p>\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u5916\u9375\u7d04\u675f\u53ef\u4ee5\u901a\u904e\u591a\u7a2e\u65b9\u6cd5\u5be6\u73fe\uff0c\u5305\u62ec\u4f7f\u7528 SQL \u8a9e\u53e5\u3001\u81ea\u52d5\u5316\u8173\u672c\u6216\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u3002\u6839\u64da\u60a8\u7684\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\uff0c\u4e26\u5728\u64cd\u4f5c\u524d\u505a\u597d\u5099\u4efd\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5feb\u901f\u9ad8\u6548\u5730\u522a\u9664\u6578\u64da\u5eab\u6240\u6709\u5916\u9375\u7684\u65b9\u6cd5\uff0c\u8f15\u9b06\u5be6\u73fe\u6578\u64da\u5eab\u7ba1\u7406\uff0c\u63d0\u5347\u64cd\u4f5c\u6548\u7387\uff0c\u7c21\u5316\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-165949","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165949","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=165949"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165949\/revisions"}],"predecessor-version":[{"id":165950,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165949\/revisions\/165950"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=165949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=165949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=165949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}