{"id":172815,"date":"2024-11-07T15:17:17","date_gmt":"2024-11-07T07:17:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/172815\/"},"modified":"2024-11-07T15:17:18","modified_gmt":"2024-11-07T07:17:18","slug":"%e5%a6%82%e4%bd%95%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e8%a1%a8%e6%95%b8%e9%87%8f%ef%bc%9f-%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9f%a5%e8%a9%a2%e6%9c%89%e5%b9%be","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/172815\/","title":{"rendered":"\u5982\u4f55\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u8868\u6578\u91cf\uff1f (\u5f9e\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u6709\u5e7e\u500b\u8868)"},"content":{"rendered":"

\u5982\u4f55\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u8868\u6578\u91cf\uff1f (\u5f9e\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u6709\u5e7e\u500b\u8868)<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u4e86\u89e3\u6578\u64da\u5eab\u4e2d\u5305\u542b\u7684\u8868\u6578\u91cf\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u6578\u64da\u5eab\u7684\u7dad\u8b77\u548c\u7ba1\u7406\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7d50\u69cb\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u67e5\u8a62\u8868\u7684\u6578\u91cf\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n

1. \u4f7f\u7528 MySQL \u67e5\u8a62\u8868\u6578\u91cf<\/h2>\n

\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u67e5\u8a62\u4fe1\u606f\u67b6\u69cb\uff08information_schema\uff09\u4f86\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u7684\u8868\u6578\u91cf\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u7684 SQL \u8a9e\u53e5\uff1a<\/p>\n

SELECT COUNT(*) \nFROM information_schema.tables \nWHERE table_schema = '\u4f60\u7684\u6578\u64da\u5eab\u540d\u7a31';<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u5c07 ‘\u4f60\u7684\u6578\u64da\u5eab\u540d\u7a31’ \u66ff\u63db\u70ba\u4f60\u60f3\u8981\u67e5\u8a62\u7684\u6578\u64da\u5eab\u540d\u7a31\u3002\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u8a72\u6578\u64da\u5eab\u4e2d\u6240\u6709\u8868\u7684\u6578\u91cf\u3002<\/p>\n
2. \u4f7f\u7528 PostgreSQL \u67e5\u8a62\u8868\u6578\u91cf<\/h2>\n
\u5728 PostgreSQL \u4e2d\uff0c\u540c\u6a23\u53ef\u4ee5\u4f7f\u7528\u7cfb\u7d71\u76ee\u9304\u4f86\u67e5\u8a62\u8868\u7684\u6578\u91cf\u3002\u4ee5\u4e0b\u662f\u76f8\u61c9\u7684 SQL \u8a9e\u53e5\uff1a<\/p>\n
SELECT COUNT(*) \nFROM information_schema.tables \nWHERE table_schema = 'public';<\/code><\/pre>\n
\u9019\u88e1\u7684 ‘public’ \u662f PostgreSQL \u4e2d\u7684\u9ed8\u8a8d\u6a21\u5f0f\u3002\u5982\u679c\u4f60\u7684\u8868\u5728\u5176\u4ed6\u6a21\u5f0f\u4e0b\uff0c\u8acb\u76f8\u61c9\u5730\u4fee\u6539 ‘table_schema’ \u7684\u503c\u3002<\/p>\n
3. \u4f7f\u7528 SQL Server \u67e5\u8a62\u8868\u6578\u91cf<\/h2>\n
\u5728 SQL Server \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u7372\u53d6\u8868\u7684\u6578\u91cf\uff1a<\/p>\n
SELECT COUNT(*) \nFROM sys.tables;<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u7576\u524d\u6578\u64da\u5eab\u4e2d\u6240\u6709\u7528\u6236\u5b9a\u7fa9\u8868\u7684\u6578\u91cf\u3002\u5982\u679c\u4f60\u60f3\u8981\u67e5\u8a62\u7279\u5b9a\u6a21\u5f0f\u4e0b\u7684\u8868\uff0c\u53ef\u4ee5\u9032\u4e00\u6b65\u6dfb\u52a0\u689d\u4ef6\uff1a<\/p>\n
SELECT COUNT(*) \nFROM sys.tables \nWHERE schema_id = SCHEMA_ID('\u4f60\u7684\u6a21\u5f0f\u540d\u7a31');<\/code><\/pre>\n
4. \u4f7f\u7528 Oracle \u67e5\u8a62\u8868\u6578\u91cf<\/h2>\n
\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u7372\u53d6\u8868\u7684\u6578\u91cf\uff1a<\/p>\n
SELECT COUNT(*) \nFROM user_tables;<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u7576\u524d\u7528\u6236\u64c1\u6709\u7684\u6240\u6709\u8868\u7684\u6578\u91cf\u3002\u5982\u679c\u4f60\u9700\u8981\u67e5\u8a62\u6240\u6709\u7528\u6236\u7684\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n
SELECT COUNT(*) \nFROM all_tables;<\/code><\/pre>\n
5. \u7e3d\u7d50<\/h2>\n
\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u8868\u6578\u91cf\u662f\u4e00\u500b\u57fa\u672c\u4f46\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u7121\u8ad6\u662f\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u3001\u7dad\u8b77\u9084\u662f\u6578\u64da\u5206\u6790\u4e2d\u90fd\u626e\u6f14\u8457\u95dc\u9375\u89d2\u8272\u3002\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u9019\u4e00\u67e5\u8a62\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u81ea\u5df1\u7684\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u3002<\/p>\n
\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u4f60\u7684\u6578\u64da\u5eab\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u4e0d\u540c\u7684\u9700\u6c42\u548c\u9810\u7b97\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 \u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u4f60\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u8868\u6578\u91cf\uff0c\u7c21\u55ae\u6b65\u9a5f\u6559\u4f60\u8f15\u9b06\u7372\u53d6\u6578\u64da\u5eab\u5167\u6240\u6709\u8868\u7684\u6578\u91cf\u8cc7\u8a0a\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-172815","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172815","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=172815"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172815\/revisions"}],"predecessor-version":[{"id":172816,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172815\/revisions\/172816"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=172815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=172815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=172815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}