{"id":93932,"date":"2024-10-19T18:07:18","date_gmt":"2024-10-19T10:07:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93932\/"},"modified":"2024-10-19T18:07:19","modified_gmt":"2024-10-19T10:07:19","slug":"oracle-hints%e8%aa%bf%e6%95%b4%e6%a9%9f%e5%88%b6%e7%9a%84%e7%b4%b0%e5%8c%96%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93932\/","title":{"rendered":"Oracle hints\u8abf\u6574\u6a5f\u5236\u7684\u7d30\u5316\u5206\u6790"},"content":{"rendered":"<h1 id=\"oracle-hints%e8%aa%bf%e6%95%b4%e6%a9%9f%e5%88%b6%e7%9a%84%e7%b4%b0%e5%8c%96%e5%88%86%e6%9e%90-elTbkgVQIS\">Oracle Hints\u8abf\u6574\u6a5f\u5236\u7684\u7d30\u5316\u5206\u6790<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cOracle\u7684\u67e5\u8a62\u512a\u5316\u5668\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u5b83\u8ca0\u8cac\u6c7a\u5b9a\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7136\u800c\uff0c\u512a\u5316\u5668\u7684\u81ea\u52d5\u6c7a\u7b56\u4e26\u4e0d\u7e3d\u662f\u80fd\u5920\u6eff\u8db3\u7279\u5b9a\u7684\u6027\u80fd\u9700\u6c42\uff0c\u56e0\u6b64Oracle\u63d0\u4f9b\u4e86\u201c\u63d0\u793a\u201d\uff08hints\uff09\u529f\u80fd\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u5c0d\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u9032\u884c\u5fae\u8abf\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u63d0\u793a\u7684\u8abf\u6574\u6a5f\u5236\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%aforacle%e6%8f%90%e7%a4%ba%ef%bc%9f-elTbkgVQIS\">\u4ec0\u9ebc\u662fOracle\u63d0\u793a\uff1f<\/h2>\n<p>Oracle\u63d0\u793a\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u8a3b\u89e3\uff0c\u901a\u904e\u5728SQL\u8a9e\u53e5\u4e2d\u6dfb\u52a0\u63d0\u793a\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6307\u793a\u512a\u5316\u5668\u4f7f\u7528\u7279\u5b9a\u7684\u57f7\u884c\u8a08\u5283\u6216\u7b56\u7565\u3002\u9019\u4e9b\u63d0\u793a\u4e0d\u6703\u6539\u8b8a\u67e5\u8a62\u7684\u7d50\u679c\uff0c\u4f46\u53ef\u4ee5\u986f\u8457\u5f71\u97ff\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e6%8f%90%e7%a4%ba%e7%9a%84%e9%a1%9e%e5%9e%8b-elTbkgVQIS\">\u63d0\u793a\u7684\u985e\u578b<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u63d0\u793a\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u63d0\u793a\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u5168\u8868\u6383\u63cf\u63d0\u793a\uff08FULL\uff09<\/strong>: \u6307\u793a\u512a\u5316\u5668\u4f7f\u7528\u5168\u8868\u6383\u63cf\u800c\u975e\u7d22\u5f15\u3002<\/li>\n<li><strong>\u7d22\u5f15\u63d0\u793a\uff08INDEX\uff09<\/strong>: \u6307\u793a\u512a\u5316\u5668\u4f7f\u7528\u7279\u5b9a\u7684\u7d22\u5f15\u3002<\/li>\n<li><strong>\u9023\u63a5\u63d0\u793a\uff08USE_NL, USE_MERGE, USE_HASH\uff09<\/strong>: \u6307\u793a\u512a\u5316\u5668\u4f7f\u7528\u7279\u5b9a\u7684\u9023\u63a5\u65b9\u6cd5\u3002<\/li>\n<li><strong>\u4e26\u884c\u63d0\u793a\uff08PARALLEL\uff09<\/strong>: \u6307\u793a\u512a\u5316\u5668\u4f7f\u7528\u4e26\u884c\u57f7\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%8f%90%e7%a4%ba-elTbkgVQIS\">\u5982\u4f55\u4f7f\u7528\u63d0\u793a<\/h2>\n<p>\u63d0\u793a\u53ef\u4ee5\u76f4\u63a5\u5d4c\u5165\u5230SQL\u8a9e\u53e5\u4e2d\uff0c\u901a\u5e38\u653e\u5728SELECT\u3001INSERT\u3001UPDATE\u6216DELETE\u8a9e\u53e5\u7684\u958b\u982d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT \/*+ FULL(emp) *\/ * FROM employees emp;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u63d0\u793a\u544a\u8a34\u512a\u5316\u5668\u5c0d\u201cemployees\u201d\u8868\u9032\u884c\u5168\u8868\u6383\u63cf\u3002<\/p>\n<h2 id=\"%e6%8f%90%e7%a4%ba%e7%9a%84%e5%84%aa%e5%8b%a2%e8%88%87%e9%a2%a8%e9%9a%aa-elTbkgVQIS\">\u63d0\u793a\u7684\u512a\u52e2\u8207\u98a8\u96aa<\/h2>\n<p>\u4f7f\u7528\u63d0\u793a\u7684\u4e3b\u8981\u512a\u52e2\u5728\u65bc\u80fd\u5920\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9762\u5c0d\u8907\u96dc\u67e5\u8a62\u6216\u5927\u578b\u6578\u64da\u96c6\u6642\u3002\u7136\u800c\uff0c\u904e\u5ea6\u4f9d\u8cf4\u63d0\u793a\u4e5f\u53ef\u80fd\u5e36\u4f86\u98a8\u96aa\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u4e0d\u7a69\u5b9a<\/strong>: \u96a8\u8457\u6578\u64da\u7684\u8b8a\u5316\uff0c\u539f\u672c\u6709\u6548\u7684\u63d0\u793a\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<li><strong>\u7dad\u8b77\u56f0\u96e3<\/strong>: \u63d0\u793a\u53ef\u80fd\u4f7f\u67e5\u8a62\u8b8a\u5f97\u96e3\u4ee5\u7406\u89e3\u548c\u7dad\u8b77\uff0c\u7279\u5225\u662f\u5c0d\u65bc\u65b0\u52a0\u5165\u7684\u958b\u767c\u8005\u3002<\/li>\n<li><strong>\u512a\u5316\u5668\u7684\u6539\u9032<\/strong>: \u96a8\u8457Oracle\u7248\u672c\u7684\u66f4\u65b0\uff0c\u512a\u5316\u5668\u7684\u7b97\u6cd5\u53ef\u80fd\u6703\u6539\u8b8a\uff0c\u5c0e\u81f4\u539f\u6709\u63d0\u793a\u5931\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-elTbkgVQIS\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u70ba\u4e86\u6709\u6548\u5730\u4f7f\u7528Oracle\u63d0\u793a\uff0c\u5efa\u8b70\u9075\u5faa\u4ee5\u4e0b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u6e2c\u8a66\u8207\u9a57\u8b49<\/strong>: \u5728\u751f\u7522\u74b0\u5883\u4e2d\u4f7f\u7528\u63d0\u793a\u4e4b\u524d\uff0c\u61c9\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9032\u884c\u5145\u5206\u7684\u6e2c\u8a66\u3002<\/li>\n<li><strong>\u76e3\u63a7\u6027\u80fd<\/strong>: \u5b9a\u671f\u76e3\u63a7\u67e5\u8a62\u6027\u80fd\uff0c\u78ba\u4fdd\u63d0\u793a\u4ecd\u7136\u6709\u6548\u3002<\/li>\n<li><strong>\u6587\u6a94\u5316\u63d0\u793a<\/strong>: \u5c0d\u4f7f\u7528\u7684\u63d0\u793a\u9032\u884c\u8a73\u7d30\u6587\u6a94\u5316\uff0c\u4ee5\u4fbf\u672a\u4f86\u7684\u7dad\u8b77\u548c\u7406\u89e3\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-elTbkgVQIS\">\u7d50\u8ad6<\/h2>\n<p>Oracle\u63d0\u793a\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002\u7136\u800c\uff0c\u4f7f\u7528\u63d0\u793a\u6642\u9700\u8b39\u614e\uff0c\u61c9\u8003\u616e\u5230\u5176\u53ef\u80fd\u5e36\u4f86\u7684\u98a8\u96aa\u548c\u7dad\u8b77\u6311\u6230\u3002\u901a\u904e\u5408\u7406\u7684\u6e2c\u8a66\u548c\u76e3\u63a7\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5229\u7528\u9019\u4e00\u529f\u80fd\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7684\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u53ca\u5176\u4ed6<code>\u4f3a\u670d\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u5206\u6790Oracle\u63d0\u793a\u8abf\u6574\u6a5f\u5236\uff0c\u63a2\u8a0e\u5176\u512a\u5316\u6027\u80fd\u7684\u7d30\u7bc0\u8207\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u5eab\u67e5\u8a62\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-93932","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93932","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=93932"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93932\/revisions"}],"predecessor-version":[{"id":93933,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93932\/revisions\/93933"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}