{"id":4983,"date":"2024-11-14T09:33:55","date_gmt":"2024-11-14T01:33:55","guid":{"rendered":"https:\/\/fwq.ai\/blog\/4983\/"},"modified":"2024-11-14T09:33:55","modified_gmt":"2024-11-14T01:33:55","slug":"oracle%e6%89%a7%e8%a1%8c%e8%ae%a1%e5%88%92%e6%80%8e%e4%b9%88%e5%88%9b%e5%bb%ba","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/4983\/","title":{"rendered":"oracle\u6267\u884c\u8ba1\u5212\u600e\u4e48\u521b\u5efa"},"content":{"rendered":"<blockquote><p>\n  oracle \u6267\u884c\u8ba1\u5212\u521b\u5efa\u65b9\u6cd5\uff1a\u81ea\u52a8\u751f\u6210\u6267\u884c\u8ba1\u5212\uff1a\u901a\u8fc7 explain plan \u547d\u4ee4\u67e5\u770b oracle \u81ea\u52a8\u751f\u6210\u7684\u8ba1\u5212\u3002\u624b\u52a8\u521b\u5efa\u6267\u884c\u8ba1\u5212\uff1a\u901a\u8fc7\u521b\u5efa\u7d22\u5f15\u3001\u4f7f\u7528\u63d0\u793a\u548c\u8c03\u6574\u4f18\u5316\u5668\u53c2\u6570\u6765\u624b\u52a8\u6307\u5b9a\u8ba1\u5212\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/21\/2024052108181664881.jpg\" class=\"aligncenter\" title=\"oracle\u6267\u884c\u8ba1\u5212\u600e\u4e48\u521b\u5efa\u63d2\u56fe\" alt=\"oracle\u6267\u884c\u8ba1\u5212\u600e\u4e48\u521b\u5efa\u63d2\u56fe\" \/><\/p>\n<p><strong>Oracle \u6267\u884c\u8ba1\u5212\u521b\u5efa\u65b9\u6cd5<\/strong><\/p>\n<p>\u521b\u5efa Oracle \u6267\u884c\u8ba1\u5212\u662f\u4f18\u5316 SQL \u8bed\u53e5\u6027\u80fd\u7684\u5173\u952e\u6b65\u9aa4\u3002\u4e0b\u9762\u4ecb\u7ecd\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u81ea\u52a8\u751f\u6210\u6267\u884c\u8ba1\u5212<\/strong><\/p>\n<p>Oracle \u5728\u6267\u884c SQL \u8bed\u53e5\u65f6\u4f1a\u81ea\u52a8\u751f\u6210\u6267\u884c\u8ba1\u5212\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u67e5\u770b\uff1a<\/p>\n<ul>\n<li>\u6267\u884c EXPLAIN PLAN \u547d\u4ee4\uff0c\u540e\u8ddf\u8981\u4f18\u5316\u7684\u8bed\u53e5\u3002<\/li>\n<li>\u8f93\u51fa\u4e2d\u5c06\u663e\u793a\u5305\u542b\u6240\u6709\u53ef\u80fd\u6267\u884c\u8ba1\u5212\u7684\u6811\u72b6\u7ed3\u6784\u3002<\/li>\n<\/ul>\n<p><strong>2. \u624b\u52a8\u521b\u5efa\u6267\u884c\u8ba1\u5212<\/strong><\/p>\n<p>\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u7d22\u5f15\u3001\u63d0\u793a\u548c\u8c03\u6574\u4f18\u5316\u5668\u53c2\u6570\u6765\u624b\u52a8\u521b\u5efa\u6267\u884c\u8ba1\u5212\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6b65\u9aa4\uff1a<\/p>\n<p><strong>\u521b\u5efa\u7d22\u5f15\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528 CREATE INDEX \u547d\u4ee4\u5728\u8868\u4e0a\u521b\u5efa\u7d22\u5f15\u3002<\/li>\n<li>\u7d22\u5f15\u53ef\u4ee5\u5e2e\u52a9 Oracle \u5feb\u901f\u67e5\u627e\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>\u4f7f\u7528\u63d0\u793a\uff1a<\/strong><\/p>\n<ul>\n<li>\u63d0\u793a\u662f\u63d0\u4f9b\u7ed9 Oracle \u7684\u5efa\u8bae\uff0c\u7528\u4e8e\u6307\u5bfc\u6267\u884c\u8ba1\u5212\u7684\u521b\u5efa\u3002<\/li>\n<li>\n<p>\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u63d0\u793a\uff1a<\/p>\n<ul>\n<li> <strong>\u57fa\u4e8e\u8868\u7684\u63d0\u793a\uff1a<\/strong>\u4f7f\u7528 TABLE_ACCESS \u6216 INDEX \u5173\u952e\u5b57\u3002<\/li>\n<li> <strong>\u57fa\u4e8e\u67e5\u8be2\u7684\u63d0\u793a\uff1a<\/strong>\u4f7f\u7528 ORDERED\u3001MERGE_JOIN \u7b49\u5173\u952e\u5b57\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>\u8c03\u6574\u4f18\u5316\u5668\u53c2\u6570\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f18\u5316\u5668\u53c2\u6570\u63a7\u5236 Oracle \u5982\u4f55\u4f18\u5316\u67e5\u8be2\u3002<\/li>\n<li>\u53ef\u4ee5\u4f7f\u7528 ALTER SYSTEM \u547d\u4ee4\u8c03\u6574\u8fd9\u4e9b\u53c2\u6570\u3002<\/li>\n<li>\u4f8b\u5982\uff0cOPTIMIZER_MODE \u53c2\u6570\u53ef\u4ee5\u66f4\u6539 Oracle \u4f7f\u7528\u7684\u4f18\u5316\u7b97\u6cd5\u3002<\/li>\n<\/ul>\n<p><strong>\u9009\u62e9\u6700\u4f73\u8ba1\u5212<\/strong><\/p>\n<p>\u5728\u521b\u5efa\u6267\u884c\u8ba1\u5212\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528 EXPLAIN PLAN \u547d\u4ee4\u6bd4\u8f83\u4e0d\u540c\u7684\u8ba1\u5212\u5e76\u9009\u62e9\u6700\u4f73\u8ba1\u5212\u3002\u6700\u4f73\u8ba1\u5212\u901a\u5e38\u5177\u6709\u6700\u4f4e\u7684\u6210\u672c\u548c\u6700\u5feb\u7684\u6267\u884c\u65f6\u95f4\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u6267\u884c\u8ba1\u5212\u600e\u4e48\u521b\u5efa\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>oracle \u6267\u884c\u8ba1\u5212\u521b\u5efa\u65b9\u6cd5\uff1a\u81ea\u52a8\u751f\u6210\u6267\u884c\u8ba1\u5212\uff1a\u901a\u8fc7 explain plan \u547d\u4ee4\u67e5\u770b oracle \u81ea\u52a8\u751f\u6210\u7684\u8ba1\u5212\u3002\u624b\u52a8\u521b\u5efa\u6267\u884c\u8ba1\u5212\uff1a\u901a\u8fc7\u521b\u5efa\u7d22\u5f15\u3001\u4f7f\u7528\u63d0\u793a\u548c\u8c03\u6574\u4f18\u5316\u5668\u53c2\u6570\u6765\u624b\u52a8\u6307\u5b9a\u8ba1\u5212\u3002 Oracle \u6267\u884c\u8ba1\u5212\u521b\u5efa\u65b9\u6cd5 \u521b\u5efa Oracle \u6267\u884c\u8ba1\u5212\u662f\u4f18\u5316 SQL \u8bed\u53e5\u6027\u80fd\u7684\u5173\u952e\u6b65\u9aa4\u3002\u4e0b\u9762\u4ecb\u7ecd\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a 1. \u81ea\u52a8\u751f\u6210\u6267\u884c\u8ba1\u5212 Oracle \u5728\u6267\u884c SQL \u8bed\u53e5\u65f6\u4f1a\u81ea\u52a8\u751f\u6210\u6267\u884c\u8ba1\u5212\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u67e5\u770b\uff1a \u6267\u884c EXPLAIN PLAN \u547d\u4ee4\uff0c\u540e\u8ddf\u8981\u4f18\u5316\u7684\u8bed\u53e5\u3002 \u8f93\u51fa\u4e2d\u5c06\u663e\u793a\u5305\u542b\u6240\u6709\u53ef\u80fd\u6267\u884c\u8ba1\u5212\u7684\u6811\u72b6\u7ed3\u6784\u3002 2. \u624b\u52a8\u521b\u5efa\u6267\u884c\u8ba1\u5212 \u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u7d22\u5f15\u3001\u63d0\u793a\u548c\u8c03\u6574\u4f18\u5316\u5668\u53c2\u6570\u6765\u624b\u52a8\u521b\u5efa\u6267\u884c\u8ba1\u5212\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6b65\u9aa4\uff1a \u521b\u5efa\u7d22\u5f15\uff1a \u4f7f\u7528 CREATE INDEX \u547d\u4ee4\u5728\u8868\u4e0a\u521b\u5efa\u7d22\u5f15\u3002 \u7d22\u5f15\u53ef\u4ee5\u5e2e\u52a9 Oracle \u5feb\u901f\u67e5\u627e\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002 \u4f7f\u7528\u63d0\u793a\uff1a \u63d0\u793a\u662f\u63d0\u4f9b\u7ed9 Oracle \u7684\u5efa\u8bae\uff0c\u7528\u4e8e\u6307\u5bfc\u6267\u884c\u8ba1\u5212\u7684\u521b\u5efa\u3002 \u6709\u4e24\u79cd\u7c7b\u578b\u7684\u63d0\u793a\uff1a \u57fa\u4e8e\u8868\u7684\u63d0\u793a\uff1a\u4f7f\u7528 TABLE_ACCESS \u6216 INDEX \u5173\u952e\u5b57\u3002 \u57fa\u4e8e\u67e5\u8be2\u7684\u63d0\u793a\uff1a\u4f7f\u7528 ORDERED\u3001MERGE_JOIN \u7b49\u5173\u952e\u5b57\u3002 \u8c03\u6574\u4f18\u5316\u5668\u53c2\u6570\uff1a \u4f18\u5316\u5668\u53c2\u6570\u63a7\u5236 Oracle \u5982\u4f55\u4f18\u5316\u67e5\u8be2\u3002 \u53ef\u4ee5\u4f7f\u7528 ALTER [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-4983","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/4983","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=4983"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/4983\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=4983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=4983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=4983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}