{"id":2307,"date":"2025-03-04T08:30:30","date_gmt":"2025-03-04T00:30:30","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2307"},"modified":"2025-03-04T08:30:30","modified_gmt":"2025-03-04T00:30:30","slug":"sqlite-%e9%99%84%e5%8a%a0%e6%95%b0%e6%8d%ae%e5%ba%93%ef%bc%88attach-database%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/04\/sqlite-%e9%99%84%e5%8a%a0%e6%95%b0%e6%8d%ae%e5%ba%93%ef%bc%88attach-database%ef%bc%89\/","title":{"rendered":"SQLite \u9644\u52a0\u6570\u636e\u5e93\uff08ATTACH DATABASE\uff09"},"content":{"rendered":"\n
\n

SQLite \u5141\u8bb8\u5728\u540c\u4e00\u4e2a\u8fde\u63a5\u4e2d\u540c\u65f6\u64cd\u4f5c\u591a\u4e2a\u6570\u636e\u5e93<\/strong>\uff0c\u8fd9\u5c31\u662f \u9644\u52a0\u6570\u636e\u5e93\uff08ATTACH DATABASE\uff09<\/strong> \u7684\u4f5c\u7528\u3002\u4f60\u53ef\u4ee5\u5728 SQL \u8bed\u53e5\u4e2d\u4f7f\u7528\u591a\u4e2a\u6570\u636e\u5e93\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u5b83\u4eec\u4e4b\u95f4\u6267\u884c JOIN \u67e5\u8be2<\/strong> \u6216 \u6570\u636e\u590d\u5236<\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

1. \u9644\u52a0\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n

\u8bed\u6cd5<\/strong><\/h3>\n\n\n\n
ATTACH DATABASE 'database_file' AS alias_name;<\/code><\/pre>\n\n\n\n
    \n
  • 'database_file'<\/code>\uff1a\u8981\u9644\u52a0\u7684\u6570\u636e\u5e93\u6587\u4ef6\u8def\u5f84\u3002<\/li>\n\n\n\n
  • alias_name<\/code>\uff1a\u8be5\u6570\u636e\u5e93\u7684\u522b\u540d\uff0c\u7528\u4e8e\u5728\u67e5\u8be2\u4e2d\u5f15\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
    \u793a\u4f8b<\/strong><\/h3>\n\n\n\n
    \u5047\u8bbe\u6709\u4e24\u4e2a SQLite \u6570\u636e\u5e93\uff1a<\/p>\n\n\n\n
      \n
    • main.db<\/code>\uff08\u4e3b\u6570\u636e\u5e93\uff09<\/li>\n\n\n\n
    • extra.db<\/code>\uff08\u9700\u8981\u9644\u52a0\u7684\u6570\u636e\u5e93\uff09<\/li>\n<\/ul>\n\n\n\n
      \u4f60\u53ef\u4ee5\u6267\u884c\uff1a<\/p>\n\n\n\n
      ATTACH DATABASE 'extra.db' AS extra;<\/code><\/pre>\n\n\n\n
      \u8fd9\u5c06\u5728\u5f53\u524d\u4f1a\u8bdd\u4e2d\u5c06 extra.db<\/code> \u9644\u52a0\u4e3a extra<\/code>\u3002<\/p>\n\n\n\n
      \n\n\n\n
      2. \u67e5\u770b\u9644\u52a0\u7684\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
      \u8981\u68c0\u67e5\u5f53\u524d\u8fde\u63a5\u7684\u6240\u6709\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u8fd0\u884c\uff1a<\/p>\n\n\n\n
      PRAGMA database_list;<\/code><\/pre>\n\n\n\n
      \u793a\u4f8b\u8f93\u51fa\uff1a<\/p>\n\n\n\n
      seq  name  file\n0    main  \/path\/to\/main.db\n1    extra \/path\/to\/extra.db<\/code><\/pre>\n\n\n\n
      \u8fd9\u91cc\u7684 main<\/code> \u662f\u9ed8\u8ba4\u6570\u636e\u5e93\uff0cextra<\/code> \u662f\u9644\u52a0\u7684\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n
      \n\n\n\n
      3. \u5728\u591a\u4e2a\u6570\u636e\u5e93\u4e4b\u95f4\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n
      \u521b\u5efa\u8868<\/strong><\/h3>\n\n\n\n
      CREATE TABLE extra.users (\n    id INTEGER PRIMARY KEY,\n    name TEXT NOT NULL\n);<\/code><\/pre>\n\n\n\n
      \u8fd9\u91cc\u7684 extra.users<\/code> \u6307\u5b9a users<\/code> \u8868\u521b\u5efa\u5728 extra.db<\/code> \u4e2d\uff0c\u800c\u4e0d\u662f main.db<\/code>\u3002<\/p>\n\n\n\n
      \u63d2\u5165\u6570\u636e<\/strong><\/h3>\n\n\n\n
      INSERT INTO extra.users (id, name) VALUES (1, 'Alice');<\/code><\/pre>\n\n\n\n
      \u8de8\u6570\u636e\u5e93\u67e5\u8be2<\/strong><\/h3>\n\n\n\n
      \u4f60\u53ef\u4ee5\u5728\u4e0d\u540c\u6570\u636e\u5e93\u7684\u8868\u4e4b\u95f4\u8fdb\u884c JOIN \u67e5\u8be2<\/strong>\uff1a<\/p>\n\n\n\n
      SELECT m.id, m.name, e.age\nFROM main.customers AS m\nJOIN extra.user_info AS e ON m.id = e.user_id;<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      4. \u5206\u79bb\uff08DETACH\uff09\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
      \u5982\u679c\u4e0d\u518d\u9700\u8981\u9644\u52a0\u7684\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n\n\n\n
      DETACH DATABASE extra;<\/code><\/pre>\n\n\n\n
      \u8fd9\u6837\uff0cextra.db<\/code> \u5c06\u4e0d\u518d\u51fa\u73b0\u5728\u5f53\u524d SQLite \u4f1a\u8bdd\u4e2d\u3002<\/p>\n\n\n\n
      \n\n\n\n
      5. Python \u4e2d\u4f7f\u7528\u9644\u52a0\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
      \u5982\u679c\u4f60\u5728 Python \u4ee3\u7801\u4e2d\u4f7f\u7528 SQLite\uff0c\u53ef\u4ee5\u8fd9\u6837\u9644\u52a0\u6570\u636e\u5e93\uff1a<\/p>\n\n\n\n
      import sqlite3\n\n# \u8fde\u63a5\u5230\u4e3b\u6570\u636e\u5e93\nconn = sqlite3.connect('main.db')\ncursor = conn.cursor()\n\n# \u9644\u52a0 extra.db\ncursor.execute(\"ATTACH DATABASE 'extra.db' AS extra;\")\n\n# \u67e5\u8be2\u9644\u52a0\u6570\u636e\u5e93\u4e2d\u7684\u8868\ncursor.execute(\"SELECT name FROM extra.sqlite_master WHERE type='table';\")\ntables = cursor.fetchall()\nprint(\"extra.db \u4e2d\u7684\u8868:\", tables)\n\n# \u5206\u79bb\u6570\u636e\u5e93\ncursor.execute(\"DETACH DATABASE extra;\")\n\n# \u5173\u95ed\u8fde\u63a5\nconn.close()<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
        \n
      • ATTACH DATABASE<\/code> \u5141\u8bb8\u5728\u540c\u4e00\u4f1a\u8bdd\u4e2d\u64cd\u4f5c\u591a\u4e2a SQLite \u6570\u636e\u5e93\u3002<\/li>\n\n\n\n
      • PRAGMA database_list;<\/code> \u53ef\u4ee5\u67e5\u770b\u5f53\u524d\u8fde\u63a5\u7684\u6570\u636e\u5e93\u3002<\/li>\n\n\n\n
      • \u4f60\u53ef\u4ee5\u8de8\u6570\u636e\u5e93\u6267\u884c SQL \u64cd\u4f5c\uff0c\u5982 SELECT<\/code>\u3001JOIN<\/code>\u3001INSERT<\/code> \u7b49\u3002<\/li>\n\n\n\n
      • DETACH DATABASE<\/code> \u53ef\u7528\u4e8e\u65ad\u5f00\u9644\u52a0\u6570\u636e\u5e93\u3002<\/li>\n\n\n\n
      • \u5728 Python \u7b49\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 ATTACH<\/code> \u8fdb\u884c\u591a\u6570\u636e\u5e93\u7ba1\u7406\u3002<\/li>\n<\/ul>\n\n\n\n
        \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        SQLite \u5141\u8bb8\u5728\u540c\u4e00\u4e2a\u8fde\u63a5\u4e2d\u540c\u65f6\u64cd\u4f5c\u591a\u4e2a\u6570\u636e\u5e93\uff0c\u8fd9\u5c31\u662f \u9644\u52a0\u6570\u636e\u5e93\uff08ATTACH DATABASE\uff09 \u7684\u4f5c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-2307","post","type-post","status-publish","format-standard","hentry","category-sqlite"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2307","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2307"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2307\/revisions"}],"predecessor-version":[{"id":2308,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2307\/revisions\/2308"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}