{"id":95076,"date":"2024-10-19T22:02:15","date_gmt":"2024-10-19T14:02:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95076\/"},"modified":"2024-10-19T22:02:15","modified_gmt":"2024-10-19T14:02:15","slug":"oracle%e9%81%9e%e6%ad%b8%e6%9f%a5%e8%a9%a2%e5%8f%af%e7%94%a8%e7%9b%b8%e9%97%9c%e5%ad%90%e5%8f%a5%e4%be%86%e9%81%8b%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95076\/","title":{"rendered":"Oracle\u905e\u6b78\u67e5\u8a62\u53ef\u7528\u76f8\u95dc\u5b50\u53e5\u4f86\u904b\u884c"},"content":{"rendered":"<h1 id=\"oracle%e9%81%9e%e6%ad%b8%e6%9f%a5%e8%a9%a2%e5%8f%af%e7%94%a8%e7%9b%b8%e9%97%9c%e5%ad%90%e5%8f%a5%e4%be%86%e9%81%8b%e8%a1%8c-XxytxKNcyk\">Oracle\u905e\u6b78\u67e5\u8a62\u53ef\u7528\u76f8\u95dc\u5b50\u53e5\u4f86\u904b\u884c<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u905e\u6b78\u67e5\u8a62\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5c64\u6b21\u7d50\u69cb\u6578\u64da\u6642\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u57f7\u884c\u905e\u6b78\u67e5\u8a62\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662f\u4f7f\u7528CTE\uff08\u516c\u7528\u8868\u8868\u9054\u5f0f\uff09\u548cCONNECT BY\u5b50\u53e5\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e9b\u65b9\u6cd5\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%81%9e%e6%ad%b8%e6%9f%a5%e8%a9%a2%ef%bc%9f-XxytxKNcyk\">\u4ec0\u9ebc\u662f\u905e\u6b78\u67e5\u8a62\uff1f<\/h2>\n<p>\u905e\u6b78\u67e5\u8a62\u662f\u6307\u4e00\u7a2e\u67e5\u8a62\u65b9\u5f0f\uff0c\u80fd\u5920\u5f9e\u4e00\u500b\u6216\u591a\u500b\u8d77\u59cb\u884c\u958b\u59cb\uff0c\u901a\u904e\u81ea\u6211\u5f15\u7528\u7684\u65b9\u5f0f\uff0c\u9010\u6b65\u67e5\u627e\u8207\u4e4b\u76f8\u95dc\u7684\u6578\u64da\u3002\u9019\u5728\u8655\u7406\u5982\u7d44\u7e54\u7d50\u69cb\u3001\u7522\u54c1\u5206\u985e\u7b49\u5c64\u6b21\u7d50\u69cb\u6578\u64da\u6642\u7279\u5225\u6709\u7528\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8connect-by%e5%ad%90%e5%8f%a5-XxytxKNcyk\">\u4f7f\u7528CONNECT BY\u5b50\u53e5<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u6700\u50b3\u7d71\u7684\u905e\u6b78\u67e5\u8a62\u65b9\u6cd5\u662f\u4f7f\u7528CONNECT BY\u5b50\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u6a39\u72c0\u7d50\u69cb\u7684\u6578\u64da\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nSELECT employee_id, manager_id, level\nFROM employees\nSTART WITH manager_id IS NULL\nCONNECT BY PRIOR employee_id = manager_id;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>START WITH<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u67e5\u8a62\u7684\u8d77\u59cb\u9ede\uff0c\u800c<code>CONNECT BY<\/code>\u5b50\u53e5\u5247\u5b9a\u7fa9\u4e86\u5982\u4f55\u5f9e\u7236\u7bc0\u9ede\u67e5\u627e\u5b50\u7bc0\u9ede\u3002<code>PRIOR<\/code>\u95dc\u9375\u5b57\u7528\u65bc\u5f15\u7528\u524d\u4e00\u5c64\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8with-recursive%e5%ad%90%e5%8f%a5-XxytxKNcyk\">\u4f7f\u7528WITH RECURSIVE\u5b50\u53e5<\/h2>\n<p>\u5f9eOracle 11g\u7248\u672c\u958b\u59cb\uff0cOracle\u5f15\u5165\u4e86\u516c\u7528\u8868\u8868\u9054\u5f0f\uff08CTE\uff09\uff0c\u9019\u4f7f\u5f97\u905e\u6b78\u67e5\u8a62\u7684\u5beb\u6cd5\u66f4\u52a0\u9748\u6d3b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528CTE\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nWITH RECURSIVE employee_hierarchy AS (\n    SELECT employee_id, manager_id, 1 AS level\n    FROM employees\n    WHERE manager_id IS NULL\n    UNION ALL\n    SELECT e.employee_id, e.manager_id, eh.level + 1\n    FROM employees e\n    JOIN employee_hierarchy eh ON e.manager_id = eh.employee_id\n)\nSELECT * FROM employee_hierarchy;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>WITH RECURSIVE<\/code>\u5b9a\u7fa9\u4e86\u4e00\u500b\u905e\u6b78CTE\uff0c\u9996\u5148\u9078\u64c7\u6240\u6709\u6c92\u6709\u7d93\u7406\u7684\u54e1\u5de5\uff0c\u7136\u5f8c\u901a\u904e\u81ea\u6211\u806f\u63a5\u4f86\u67e5\u627e\u6240\u6709\u4e0b\u5c6c\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u52e2\u5728\u65bc\u5176\u53ef\u8b80\u6027\u548c\u9748\u6d3b\u6027\u3002<\/p>\n<h2 id=\"%e9%81%9e%e6%ad%b8%e6%9f%a5%e8%a9%a2%e7%9a%84%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-XxytxKNcyk\">\u905e\u6b78\u67e5\u8a62\u7684\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u96d6\u7136\u905e\u6b78\u67e5\u8a62\u975e\u5e38\u5f37\u5927\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u9700\u8981\u6ce8\u610f\u6027\u80fd\u554f\u984c\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u96c6\u6642\uff0c\u905e\u6b78\u67e5\u8a62\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li>\u9650\u5236\u67e5\u8a62\u7684\u6df1\u5ea6\uff1a\u4f7f\u7528<code>LEVEL<\/code>\u51fd\u6578\u4f86\u9650\u5236\u67e5\u8a62\u7684\u5c64\u6b21\u3002<\/li>\n<li>\u4f7f\u7528\u7d22\u5f15\uff1a\u78ba\u4fdd\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u4e0a\u6709\u9069\u7576\u7684\u7d22\u5f15\u3002<\/li>\n<li>\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8a08\u7b97\uff1a\u5728\u67e5\u8a62\u4e2d\u53ea\u9078\u64c7\u9700\u8981\u7684\u5217\uff0c\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-XxytxKNcyk\">\u7d50\u8ad6<\/h2>\n<p>\u905e\u6b78\u67e5\u8a62\u5728Oracle\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u5c64\u6b21\u7d50\u69cb\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528CONNECT BY\u5b50\u53e5\u9084\u662fWITH RECURSIVE\u5b50\u53e5\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u6cd5\u3002\u4e86\u89e3\u9019\u4e9b\u67e5\u8a62\u7684\u6027\u80fd\u7279\u9ede\u548c\u512a\u5316\u6280\u5de7\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6574\u9ad4\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bcVPS\u6216\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u7684\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u905e\u6b78\u67e5\u8a62\u7684\u76f8\u95dc\u5b50\u53e5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u904b\u884c\u5c64\u6b21\u7d50\u69cb\u6578\u64da\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-95076","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95076","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=95076"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95076\/revisions"}],"predecessor-version":[{"id":95077,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95076\/revisions\/95077"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}