{"id":2594,"date":"2025-03-11T23:16:32","date_gmt":"2025-03-11T15:16:32","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2594"},"modified":"2025-03-11T23:16:32","modified_gmt":"2025-03-11T15:16:32","slug":"postgresql-%e5%88%a0%e9%99%a4%e6%95%b0%e6%8d%ae%e5%ba%93-drop-database","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/11\/postgresql-%e5%88%a0%e9%99%a4%e6%95%b0%e6%8d%ae%e5%ba%93-drop-database\/","title":{"rendered":"PostgreSQL \u5220\u9664\u6570\u636e\u5e93 (DROP DATABASE)"},"content":{"rendered":"\n

\u5728 PostgreSQL \u4e2d\uff0cDROP DATABASE<\/code> \u547d\u4ee4\u7528\u4e8e\u5220\u9664\u6570\u636e\u5e93\u53ca\u5176\u6240\u6709\u5173\u8054\u7684\u6570\u636e\u3002\u5220\u9664\u6570\u636e\u5e93\u662f\u4e0d\u53ef\u9006\u7684\u64cd\u4f5c\uff0c\u5220\u9664\u540e\u65e0\u6cd5\u6062\u590d<\/strong>\uff0c\u56e0\u6b64\u5728\u6267\u884c\u6b64\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8bae\u5148\u5907\u4efd\u6570\u636e\u3002<\/p>\n\n\n\n

\n\n\n\n

1. DROP DATABASE<\/code> \u8bed\u6cd5<\/strong><\/h2>\n\n\n\n
DROP DATABASE [IF EXISTS] database_name;<\/code><\/pre>\n\n\n\n
\u53c2\u6570\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n
    \n
  • database_name<\/code>\uff1a\u8981\u5220\u9664\u7684\u6570\u636e\u5e93\u540d\u79f0\u3002<\/li>\n\n\n\n
  • IF EXISTS<\/code>\uff08\u53ef\u9009\uff09\uff1a\u5982\u679c\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u5219\u4e0d\u4f1a\u62a5\u9519\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u6761\u63d0\u793a\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    2. \u5220\u9664\u6570\u636e\u5e93\u7684\u9650\u5236<\/strong><\/h2>\n\n\n\n
    (1) \u4e0d\u80fd\u5220\u9664\u5f53\u524d\u6b63\u5728\u4f7f\u7528\u7684\u6570\u636e\u5e93<\/strong><\/h3>\n\n\n\n
    PostgreSQL \u4e0d\u5141\u8bb8\u5220\u9664\u5f53\u524d\u8fde\u63a5\u7684\u6570\u636e\u5e93<\/strong>\uff0c\u5426\u5219\u4f1a\u62a5\u9519\uff1a<\/p>\n\n\n\n
    ERROR:  cannot drop the currently open database<\/code><\/pre>\n\n\n\n
    \u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n
      \n
    • \u5148\u5207\u6362\u5230\u53e6\u4e00\u4e2a\u6570\u636e\u5e93\uff0c\u5982 postgres<\/code>\uff1a<\/li>\n<\/ul>\n\n\n\n
        \\c postgres\n  DROP DATABASE testdb;<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      (2) \u4e0d\u80fd\u5220\u9664\u6709\u6d3b\u52a8\u8fde\u63a5\u7684\u6570\u636e\u5e93<\/strong><\/h3>\n\n\n\n
      \u5982\u679c\u5176\u4ed6\u7528\u6237\u6216\u8fdb\u7a0b\u6b63\u5728\u4f7f\u7528\u8be5\u6570\u636e\u5e93\uff0cDROP DATABASE<\/code> \u4f1a\u5931\u8d25\uff1a<\/p>\n\n\n\n
      ERROR:  database \"testdb\" is being accessed by other users<\/code><\/pre>\n\n\n\n
      \u89e3\u51b3\u65b9\u6848\uff1a<\/strong>
      \u53ef\u4ee5\u5148\u7ec8\u6b62\u6240\u6709\u8fde\u63a5\u5230\u8be5\u6570\u636e\u5e93\u7684\u8fdb\u7a0b\uff1a<\/p>\n\n\n\n
      SELECT pg_terminate_backend(pg_stat_activity.pid)\nFROM pg_stat_activity\nWHERE datname = 'testdb';<\/code><\/pre>\n\n\n\n
      \u7136\u540e\u518d\u6267\u884c\uff1a<\/p>\n\n\n\n
      DROP DATABASE testdb;<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      3. \u4f7f\u7528 IF EXISTS<\/code> \u9632\u6b62\u9519\u8bef<\/strong><\/h2>\n\n\n\n
      \u5982\u679c\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0c\u76f4\u63a5\u6267\u884c DROP DATABASE<\/code> \u53ef\u80fd\u4f1a\u62a5\u9519\uff1a<\/p>\n\n\n\n
      ERROR: database \"testdb\" does not exist<\/code><\/pre>\n\n\n\n
      \u53ef\u4ee5\u4f7f\u7528 IF EXISTS<\/code> \u9009\u9879\uff0c\u907f\u514d\u62a5\u9519\uff1a<\/p>\n\n\n\n
      DROP DATABASE IF EXISTS testdb;<\/code><\/pre>\n\n\n\n
      \u5982\u679c\u6570\u636e\u5e93\u4e0d\u5b58\u5728\uff0cPostgreSQL \u53ea\u4f1a\u8fd4\u56de\u4e00\u4e2a\u63d0\u793a\u4fe1\u606f\uff0c\u800c\u4e0d\u4f1a\u62a5\u9519<\/strong>\uff1a<\/p>\n\n\n\n
      NOTICE:  database \"testdb\" does not exist, skipping<\/code><\/pre>\n\n\n\n
      \n\n\n\n
      4. \u4f7f\u7528 DROP DATABASE<\/code> \u7684\u6743\u9650\u8981\u6c42<\/strong><\/h2>\n\n\n\n
      \u53ea\u6709 \u8d85\u7ea7\u7528\u6237<\/strong> \u6216 \u6570\u636e\u5e93\u7684\u6240\u6709\u8005<\/strong> \u624d\u80fd\u5220\u9664\u6570\u636e\u5e93\u3002
      \u666e\u901a\u7528\u6237\u5982\u679c\u5c1d\u8bd5\u5220\u9664\u6570\u636e\u5e93\uff0c\u4f1a\u9047\u5230\u5982\u4e0b\u9519\u8bef\uff1a<\/p>\n\n\n\n
      ERROR:  must be owner of database \"testdb\"<\/code><\/pre>\n\n\n\n
      \u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n\n\n\n
        \n
      • \u4ee5\u8d85\u7ea7\u7528\u6237\u8eab\u4efd\u8fde\u63a5 PostgreSQL<\/strong>\uff08\u5982 postgres<\/code> \u7528\u6237\uff09\u3002<\/li>\n\n\n\n
      • \u5982\u679c\u9700\u8981\u8d4b\u4e88\u666e\u901a\u7528\u6237\u5220\u9664\u6743\u9650\uff0c\u53ef\u4ee5\u4f7f\u7528 ALTER DATABASE<\/code> \u66f4\u6539\u6240\u6709\u8005<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
          ALTER DATABASE testdb OWNER TO myuser;<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        5. \u4f7f\u7528 psql<\/code> \u547d\u4ee4\u884c\u5220\u9664\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
        \u5982\u679c\u4f60\u4f7f\u7528 psql<\/code> \u4ea4\u4e92\u5f0f\u7ec8\u7aef\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\uff1a<\/p>\n\n\n\n
        psql -U postgres -d postgres -c \"DROP DATABASE testdb;\"<\/code><\/pre>\n\n\n\n
        \u6216\u8005\uff1a<\/p>\n\n\n\n
        psql -U postgres\npostgres=# DROP DATABASE testdb;<\/code><\/pre>\n\n\n\n
        \u786e\u4fdd\u4f60\u8fde\u63a5\u7684\u662f postgres<\/code> \u6216\u5176\u4ed6\u6570\u636e\u5e93\uff0c\u800c\u4e0d\u662f testdb<\/code> \u672c\u8eab\uff01<\/strong><\/p>\n\n\n\n
        \n\n\n\n
        6. \u5f3a\u5236\u5220\u9664\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
        PostgreSQL \u4e0d\u652f\u6301 DROP DATABASE<\/code> \u7684 CASCADE<\/code> \u9009\u9879<\/strong>\uff0c\u56e0\u6b64\u5982\u679c\u6570\u636e\u5e93\u88ab\u8fde\u63a5\uff0c\u65e0\u6cd5\u76f4\u63a5\u5f3a\u5236\u5220\u9664\u3002<\/p>\n\n\n\n
        \u4f46\u53ef\u4ee5\u4f7f\u7528 pg_terminate_backend<\/code> \u7ec8\u6b62\u8fde\u63a5\u540e\u518d\u5220\u9664\uff1a<\/p>\n\n\n\n
        SELECT pg_terminate_backend(pg_stat_activity.pid)\nFROM pg_stat_activity\nWHERE datname = 'testdb';\n\nDROP DATABASE testdb;<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        7. \u901a\u8fc7 pgAdmin<\/code> \u5220\u9664\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
          \n
        1. \u6253\u5f00 pgAdmin<\/code> \u5e76\u8fde\u63a5\u5230 PostgreSQL \u670d\u52a1\u5668\u3002<\/li>\n\n\n\n
        2. \u5728\u5de6\u4fa7\u5bfc\u822a\u680f\u4e2d\u627e\u5230 Databases<\/strong>\uff0c\u5c55\u5f00\u6570\u636e\u5e93\u5217\u8868\u3002<\/li>\n\n\n\n
        3. \u53f3\u952e\u70b9\u51fb\u8981\u5220\u9664\u7684\u6570\u636e\u5e93\uff08\u5982 testdb<\/code>\uff09\uff0c\u9009\u62e9 Delete\/Drop<\/strong>\u3002<\/li>\n\n\n\n
        4. \u5982\u679c\u63d0\u793a\u6709\u8fde\u63a5\uff0c\u5148\u4f7f\u7528 pgAdmin<\/code> \u7ec8\u7aef\u6267\u884c\uff1a<\/li>\n<\/ol>\n\n\n\n
             SELECT pg_terminate_backend(pg_stat_activity.pid)\n   FROM pg_stat_activity\n   WHERE datname = 'testdb';<\/code><\/pre>\n\n\n\n
            \n
          1. \u786e\u8ba4\u5220\u9664\u3002<\/li>\n<\/ol>\n\n\n\n
            \n\n\n\n
            8. \u5907\u4efd\u6570\u636e\u5e93\u518d\u5220\u9664\uff08\u63a8\u8350\uff09<\/strong><\/h2>\n\n\n\n
            \u5728\u5220\u9664\u6570\u636e\u5e93\u524d\uff0c\u5efa\u8bae\u5148\u4f7f\u7528 pg_dump<\/code> \u5907\u4efd\uff1a<\/p>\n\n\n\n
            pg_dump -U postgres -F c -b -v -f \"testdb_backup.dump\" testdb<\/code><\/pre>\n\n\n\n
            \u7136\u540e\u518d\u6267\u884c\u5220\u9664\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
            DROP DATABASE testdb;<\/code><\/pre>\n\n\n\n
            \n\n\n\n
            9. \u5e38\u89c1\u9519\u8bef\u53ca\u89e3\u51b3\u65b9\u6848<\/strong><\/h2>\n\n\n\n
            \u9519\u8bef\u4fe1\u606f<\/strong><\/th>\u539f\u56e0<\/strong><\/th>\u89e3\u51b3\u65b9\u6848<\/strong><\/th><\/tr><\/thead>
            ERROR: cannot drop the currently open database<\/code><\/td>\u4f60\u5f53\u524d\u8fde\u63a5\u7684\u5c31\u662f\u8981\u5220\u9664\u7684\u6570\u636e\u5e93<\/td>\u5148\u5207\u6362\u5230 postgres<\/code> \u6570\u636e\u5e93\uff1apsql -U postgres -d postgres<\/code><\/td><\/tr>
            ERROR: database \"testdb\" is being accessed by other users<\/code><\/td>\u5176\u4ed6\u7528\u6237\u6216\u8fdb\u7a0b\u6b63\u5728\u4f7f\u7528\u6570\u636e\u5e93<\/td>\u5148\u7ec8\u6b62\u8fde\u63a5\uff1apg_terminate_backend()<\/code><\/td><\/tr>
            ERROR: must be owner of database \"testdb\"<\/code><\/td>\u4f60\u4e0d\u662f\u6570\u636e\u5e93\u7684\u6240\u6709\u8005<\/td>\u4ee5\u8d85\u7ea7\u7528\u6237\u8eab\u4efd\u6267\u884c\uff0c\u6216\u4fee\u6539\u6570\u636e\u5e93\u6240\u6709\u8005<\/td><\/tr>
            ERROR: database \"testdb\" does not exist<\/code><\/td>\u8bd5\u56fe\u5220\u9664\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u6570\u636e\u5e93<\/td>\u4f7f\u7528 DROP DATABASE IF EXISTS testdb;<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
            \n\n\n\n
            10. \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
              \n
            • DROP DATABASE<\/code> \u7528\u4e8e\u5220\u9664\u6570\u636e\u5e93\uff0c\u4f46\u5fc5\u987b \u5148\u65ad\u5f00\u8fde\u63a5<\/strong>\uff0c\u5426\u5219\u4f1a\u5931\u8d25\u3002<\/li>\n\n\n\n
            • IF EXISTS<\/code> \u53ef\u9632\u6b62\u5220\u9664\u4e0d\u5b58\u5728\u7684\u6570\u636e\u5e93\u65f6\u62a5\u9519\u3002<\/li>\n\n\n\n
            • pg_terminate_backend()<\/code> \u53ef\u4ee5\u7ec8\u6b62\u8fde\u63a5\u5230\u6570\u636e\u5e93\u7684\u8fdb\u7a0b\uff0c\u4ee5\u4fbf\u6210\u529f\u5220\u9664\u3002<\/li>\n\n\n\n
            • \u53ea\u6709\u8d85\u7ea7\u7528\u6237\u6216\u6570\u636e\u5e93\u6240\u6709\u8005\u53ef\u4ee5\u5220\u9664\u6570\u636e\u5e93\u3002<\/li>\n\n\n\n
            • \u5220\u9664\u6570\u636e\u5e93\u524d\uff0c\u5efa\u8bae\u5148\u5907\u4efd\u6570\u636e<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n
              \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
              \u5728 PostgreSQL \u4e2d\uff0cDROP DATABASE \u547d\u4ee4\u7528\u4e8e\u5220\u9664\u6570\u636e\u5e93\u53ca\u5176\u6240\u6709\u5173\u8054\u7684\u6570\u636e\u3002\u5220\u9664\u6570\u636e\u5e93\u662f\u4e0d […]<\/p>\n","protected":false},"author":1,"featured_media":2595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78],"tags":[],"class_list":["post-2594","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-postgresql"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2594","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=2594"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2594\/revisions"}],"predecessor-version":[{"id":2596,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2594\/revisions\/2596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/2595"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}