{"id":5743,"date":"2024-11-14T10:46:11","date_gmt":"2024-11-14T02:46:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5743\/"},"modified":"2024-11-14T10:46:11","modified_gmt":"2024-11-14T02:46:11","slug":"oracle%e7%b4%a2%e5%bc%95%e6%80%8e%e4%b9%88%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5743\/","title":{"rendered":"oracle\u7d22\u5f15\u600e\u4e48\u4f7f\u7528"},"content":{"rendered":"<blockquote><p>\n  oracle\u7d22\u5f15\u662f\u4e00\u79cd\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u7684\u6570\u636e\u5e93\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u7684\u6307\u9488\u6765\u6307\u5411\u6570\u636e\uff0c\u5e38\u7528\u7c7b\u578b\u5305\u62ecb-tree\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u4f4d\u56fe\u7d22\u5f15\u3002\u7d22\u5f15\u901a\u8fc7\u7f29\u5c0f\u641c\u7d22\u8303\u56f4\u6765\u52a0\u901f\u67e5\u8be2\uff0c\u4f46\u9700\u8003\u8651\u67e5\u8be2\u7c7b\u578b\u3001\u8868\u5927\u5c0f\u548c\u6570\u636e\u5206\u5e03\u6765\u9009\u62e9\u5408\u9002\u7d22\u5f15\u3002\u968f\u7740\u6570\u636e\u66f4\u65b0\uff0c\u7d22\u5f15\u9700\u8981\u7ef4\u62a4\uff0coracle\u4f1a\u81ea\u52a8\u7ef4\u62a4\u5927\u591a\u6570\u7d22\u5f15\uff0c\u4f46\u4f4d\u56fe\u7d22\u5f15\u53ef\u80fd\u9700\u8981\u624b\u52a8\u91cd\u5efa\u3002\u7d22\u5f15\u5bf9\u6027\u80fd\u6709\u5f71\u54cd\uff0c\u5305\u62ec\u7a7a\u95f4\u5f00\u9500\u3001\u66f4\u65b0\u5f00\u9500\u548c\u5f71\u54cd\u67e5\u8be2\u8ba1\u5212\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/30\/2024053021512366327.jpg\" class=\"aligncenter\" title=\"oracle\u7d22\u5f15\u600e\u4e48\u4f7f\u7528\u63d2\u56fe\" alt=\"oracle\u7d22\u5f15\u600e\u4e48\u4f7f\u7528\u63d2\u56fe\" \/><\/p>\n<p><strong>Oracle\u7d22\u5f15\uff1a\u4f7f\u7528\u6307\u5357<\/strong><\/p>\n<p><strong>\u7d22\u5f15\u6982\u8ff0<\/strong><\/p>\n<p>Oracle\u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u5e93\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u6216\u5217\u7ec4\u7684\u6307\u9488\u6765\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n<p><strong>\u7d22\u5f15\u7684\u7c7b\u578b<\/strong><\/p>\n<p>Oracle\u652f\u6301\u591a\u79cd\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u6700\u5e38\u89c1\u7684\u6709\uff1a<\/p>\n<ul>\n<li> <strong>B-Tree\u7d22\u5f15\uff1a<\/strong>\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u9002\u5408\u5927\u591a\u6570\u67e5\u8be2\u3002<\/li>\n<li> <strong>\u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u7b49\u503c\u6bd4\u8f83\uff0c\u6bd4B-Tree\u7d22\u5f15\u66f4\u9002\u5408\u4e8e\u5927\u8868\u3002<\/li>\n<li> <strong>\u4f4d\u56fe\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\uff0c\u53ef\u4ee5\u63d0\u9ad8\u5bf9\u6570\u636e\u5b50\u96c6\u7684\u67e5\u8be2\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<p><strong>\u7d22\u5f15\u7684\u521b\u5efa<\/strong><\/p>\n<p>\u8981\u521b\u5efa\u7d22\u5f15\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<pre>CREATE INDEX &lt;\u7d22\u5f15\u540d\u79f0&gt; ON &lt;\u8868\u540d&gt; (&lt;\u5217\u540d&gt;)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>CREATE INDEX idx_employees_name ON employees (last_name, first_name)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7d22\u5f15\u7684\u4f7f\u7528<\/strong><\/p>\n<p>\u7d22\u5f15\u901a\u8fc7\u5728\u67e5\u8be2\u8fc7\u7a0b\u4e2d\u7f29\u5c0f\u641c\u7d22\u8303\u56f4\u6765\u63d0\u9ad8\u6027\u80fd\u3002\u5f53\u67e5\u8be2\u4e2d\u5305\u542b\u5e26\u6709\u7d22\u5f15\u7684\u5217\u65f6\uff0cOracle\u5c06\u4f7f\u7528\u7d22\u5f15\u5feb\u901f\u67e5\u627e\u5339\u914d\u7684\u6570\u636e\u3002<\/p>\n<p><strong>\u9009\u62e9\u6b63\u786e\u7684\u7d22\u5f15<\/strong><\/p>\n<p>\u9009\u62e9\u6b63\u786e\u7684\u7d22\u5f15\u5bf9\u4e8e\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u975e\u5e38\u91cd\u8981\u3002\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li> <strong>\u67e5\u8be2\u7c7b\u578b\uff1a<\/strong> B-Tree\u7d22\u5f15\u9002\u5408\u4e8e\u8303\u56f4\u67e5\u8be2\uff0c\u800c\u54c8\u5e0c\u7d22\u5f15\u9002\u5408\u4e8e\u7b49\u503c\u6bd4\u8f83\u3002<\/li>\n<li> <strong>\u8868\u5927\u5c0f\uff1a<\/strong> \u54c8\u5e0c\u7d22\u5f15\u5bf9\u4e8e\u5927\u8868\u66f4\u6709\u6548\u3002<\/li>\n<li> <strong>\u6570\u636e\u5206\u5e03\uff1a<\/strong> \u5982\u679c\u6570\u636e\u5206\u5e03\u5747\u5300\uff0c\u54c8\u5e0c\u7d22\u5f15\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>\u7d22\u5f15\u7684\u7ef4\u62a4<\/strong><\/p>\n<p>\u968f\u7740\u6570\u636e\u66f4\u65b0\uff0c\u9700\u8981\u7ef4\u62a4\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176\u6709\u6548\u6027\u3002Oracle\u4f1a\u81ea\u52a8\u7ef4\u62a4\u5927\u591a\u6570\u7d22\u5f15\uff0c\u4f46\u5bf9\u4e8e\u67d0\u4e9b\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5982 \u4f4d\u56fe\u7d22\u5f15\uff0c\u53ef\u80fd\u9700\u8981\u624b\u52a8\u91cd\u5efa\u3002<\/p>\n<p><strong>\u7d22\u5f15\u7684\u6027\u80fd\u5f71\u54cd<\/strong><\/p>\n<p>\u7d22\u5f15\u867d\u7136\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff0c\u4f46\u5b83\u4eec\u4e5f\u4f1a\u5bf9\u6570\u636e\u5e93\u6027\u80fd\u4ea7\u751f\u4e00\u4e9b\u5f71\u54cd\uff1a<\/p>\n<ul>\n<li> <strong>\u7a7a\u95f4\u5f00\u9500\uff1a<\/strong> \u7d22\u5f15\u9700\u8981\u989d\u5916\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/li>\n<li> <strong>\u66f4\u65b0\u5f00\u9500\uff1a<\/strong> \u66f4\u65b0\u5e26\u7d22\u5f15\u7684\u8868\u65f6\uff0c\u9700\u8981\u66f4\u65b0\u7d22\u5f15\uff0c\u8fd9\u4f1a\u964d\u4f4e\u63d2\u5165\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n<li> <strong>\u67e5\u8be2\u8ba1\u5212\uff1a<\/strong> Oracle\u67e5\u8be2\u4f18\u5316\u5668\u4f1a\u6839\u636e\u7d22\u5f15\u9009\u62e9\u6700\u4f73\u67e5\u8be2\u8ba1\u5212\u3002\u9009\u62e9\u9519\u8bef\u7684\u7d22\u5f15\u53ef\u80fd\u4f1a\u5bfc\u81f4\u67e5\u8be2\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u7d22\u5f15\u600e\u4e48\u4f7f\u7528\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\u7d22\u5f15\u662f\u4e00\u79cd\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u7684\u6570\u636e\u5e93\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u7684\u6307\u9488\u6765\u6307\u5411\u6570\u636e\uff0c\u5e38\u7528\u7c7b\u578b\u5305\u62ecb-tree\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u4f4d\u56fe\u7d22\u5f15\u3002\u7d22\u5f15\u901a\u8fc7\u7f29\u5c0f\u641c\u7d22\u8303\u56f4\u6765\u52a0\u901f\u67e5\u8be2\uff0c\u4f46\u9700\u8003\u8651\u67e5\u8be2\u7c7b\u578b\u3001\u8868\u5927\u5c0f\u548c\u6570\u636e\u5206\u5e03\u6765\u9009\u62e9\u5408\u9002\u7d22\u5f15\u3002\u968f\u7740\u6570\u636e\u66f4\u65b0\uff0c\u7d22\u5f15\u9700\u8981\u7ef4\u62a4\uff0coracle\u4f1a\u81ea\u52a8\u7ef4\u62a4\u5927\u591a\u6570\u7d22\u5f15\uff0c\u4f46\u4f4d\u56fe\u7d22\u5f15\u53ef\u80fd\u9700\u8981\u624b\u52a8\u91cd\u5efa\u3002\u7d22\u5f15\u5bf9\u6027\u80fd\u6709\u5f71\u54cd\uff0c\u5305\u62ec\u7a7a\u95f4\u5f00\u9500\u3001\u66f4\u65b0\u5f00\u9500\u548c\u5f71\u54cd\u67e5\u8be2\u8ba1\u5212\u3002 Oracle\u7d22\u5f15\uff1a\u4f7f\u7528\u6307\u5357 \u7d22\u5f15\u6982\u8ff0 Oracle\u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u5e93\u7ed3\u6784\uff0c\u5b83\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u6216\u5217\u7ec4\u7684\u6307\u9488\u6765\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u3002 \u7d22\u5f15\u7684\u7c7b\u578b Oracle\u652f\u6301\u591a\u79cd\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u6700\u5e38\u89c1\u7684\u6709\uff1a B-Tree\u7d22\u5f15\uff1a\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u9002\u5408\u5927\u591a\u6570\u67e5\u8be2\u3002 \u54c8\u5e0c\u7d22\u5f15\uff1a\u7528\u4e8e\u7b49\u503c\u6bd4\u8f83\uff0c\u6bd4B-Tree\u7d22\u5f15\u66f4\u9002\u5408\u4e8e\u5927\u8868\u3002 \u4f4d\u56fe\u7d22\u5f15\uff1a\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\uff0c\u53ef\u4ee5\u63d0\u9ad8\u5bf9\u6570\u636e\u5b50\u96c6\u7684\u67e5\u8be2\u901f\u5ea6\u3002 \u7d22\u5f15\u7684\u521b\u5efa \u8981\u521b\u5efa\u7d22\u5f15\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a CREATE INDEX &lt;\u7d22\u5f15\u540d\u79f0&gt; ON &lt;\u8868\u540d&gt; (&lt;\u5217\u540d&gt;) \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff1a CREATE INDEX idx_employees_name ON employees (last_name, first_name) \u767b\u5f55\u540e\u590d\u5236 \u7d22\u5f15\u7684\u4f7f\u7528 \u7d22\u5f15\u901a\u8fc7\u5728\u67e5\u8be2\u8fc7\u7a0b\u4e2d\u7f29\u5c0f\u641c\u7d22\u8303\u56f4\u6765\u63d0\u9ad8\u6027\u80fd\u3002\u5f53\u67e5\u8be2\u4e2d\u5305\u542b\u5e26\u6709\u7d22\u5f15\u7684\u5217\u65f6\uff0cOracle\u5c06\u4f7f\u7528\u7d22\u5f15\u5feb\u901f\u67e5\u627e\u5339\u914d\u7684\u6570\u636e\u3002 \u9009\u62e9\u6b63\u786e\u7684\u7d22\u5f15 \u9009\u62e9\u6b63\u786e\u7684\u7d22\u5f15\u5bf9\u4e8e\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u975e\u5e38\u91cd\u8981\u3002\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a \u67e5\u8be2\u7c7b\u578b\uff1a B-Tree\u7d22\u5f15\u9002\u5408\u4e8e\u8303\u56f4\u67e5\u8be2\uff0c\u800c\u54c8\u5e0c\u7d22\u5f15\u9002\u5408\u4e8e\u7b49\u503c\u6bd4\u8f83\u3002 \u8868\u5927\u5c0f\uff1a \u54c8\u5e0c\u7d22\u5f15\u5bf9\u4e8e\u5927\u8868\u66f4\u6709\u6548\u3002 \u6570\u636e\u5206\u5e03\uff1a \u5982\u679c\u6570\u636e\u5206\u5e03\u5747\u5300\uff0c\u54c8\u5e0c\u7d22\u5f15\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002 \u7d22\u5f15\u7684\u7ef4\u62a4 \u968f\u7740\u6570\u636e\u66f4\u65b0\uff0c\u9700\u8981\u7ef4\u62a4\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176\u6709\u6548\u6027\u3002Oracle\u4f1a\u81ea\u52a8\u7ef4\u62a4\u5927\u591a\u6570\u7d22\u5f15\uff0c\u4f46\u5bf9\u4e8e\u67d0\u4e9b\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5982 \u4f4d\u56fe\u7d22\u5f15\uff0c\u53ef\u80fd\u9700\u8981\u624b\u52a8\u91cd\u5efa\u3002 \u7d22\u5f15\u7684\u6027\u80fd\u5f71\u54cd \u7d22\u5f15\u867d\u7136\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\uff0c\u4f46\u5b83\u4eec\u4e5f\u4f1a\u5bf9\u6570\u636e\u5e93\u6027\u80fd\u4ea7\u751f\u4e00\u4e9b\u5f71\u54cd\uff1a \u7a7a\u95f4\u5f00\u9500\uff1a \u7d22\u5f15\u9700\u8981\u989d\u5916\u7684\u5b58\u50a8\u7a7a\u95f4\u3002 \u66f4\u65b0\u5f00\u9500\uff1a \u66f4\u65b0\u5e26\u7d22\u5f15\u7684\u8868\u65f6\uff0c\u9700\u8981\u66f4\u65b0\u7d22\u5f15\uff0c\u8fd9\u4f1a\u964d\u4f4e\u63d2\u5165\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u6027\u80fd\u3002 \u67e5\u8be2\u8ba1\u5212\uff1a Oracle\u67e5\u8be2\u4f18\u5316\u5668\u4f1a\u6839\u636e\u7d22\u5f15\u9009\u62e9\u6700\u4f73\u67e5\u8be2\u8ba1\u5212\u3002\u9009\u62e9\u9519\u8bef\u7684\u7d22\u5f15\u53ef\u80fd\u4f1a\u5bfc\u81f4\u67e5\u8be2\u6027\u80fd\u4e0b\u964d\u3002 \u4ee5\u4e0a\u5c31\u662f\u7d22\u5f15\u600e\u4e48\u4f7f\u7528\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},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5743","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5743","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=5743"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5743\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}