{"id":5684,"date":"2024-11-14T08:19:23","date_gmt":"2024-11-14T00:19:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5684\/"},"modified":"2024-11-14T08:19:23","modified_gmt":"2024-11-14T00:19:23","slug":"sql%e6%80%8e%e4%b9%88%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5684\/","title":{"rendered":"sql\u600e\u4e48\u4f7f\u7528\u7d22\u5f15"},"content":{"rendered":"<blockquote><p>\n  \u7d22\u5f15\u662f\u6570\u636e\u5e93\u4e2d\u7528\u4e8e\u52a0\u5feb\u6570\u636e\u68c0\u7d22\u7684\u7279\u6b8a\u6570\u636e\u7ed3\u6784\u3002\u521b\u5efa\u7d22\u5f15\u65f6\uff0c\u4f7f\u7528 create index \u8bed\u53e5\u5728\u8868\u4e2d\u6307\u5b9a\u8981\u7d22\u5f15\u7684\u5217\u3002\u7d22\u5f15\u7c7b\u578b\u5305\u62ec\uff1ab-tree \u7d22\u5f15\uff08\u8303\u56f4\u67e5\u627e\uff09\u3001\u54c8\u5e0c\u7d22\u5f15\uff08\u552f\u4e00\u503c\u67e5\u627e\uff09\u548c\u5168\u6587\u7d22\u5f15\uff08\u6587\u672c\u641c\u7d22\uff09\u3002\u9009\u62e9\u7d22\u5f15\u5217\u65f6\uff0c\u5e94\u8003\u8651\u7ecf\u5e38\u7528\u4e8e\u641c\u7d22\u3001\u57fa\u6570\u9ad8\u548c\u6570\u636e\u5206\u5e03\u5747\u5300\u7684\u5217\u3002\u5b9a\u671f\u7ef4\u62a4\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c\uff0c\u5e76\u6839\u636e\u9700\u8981\u4f7f\u7528\u590d\u5408\u7d22\u5f15\u3001\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u548c\u4f18\u5316\u7d22\u5f15\u6765\u63d0\u5347\u6027\u80fd\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/30\/2024053020393784490.jpg\" class=\"aligncenter\" title=\"sql\u600e\u4e48\u4f7f\u7528\u7d22\u5f15\u63d2\u56fe\" alt=\"sql\u600e\u4e48\u4f7f\u7528\u7d22\u5f15\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 SQL \u7d22\u5f15<\/strong><\/p>\n<p><strong>\u7d22\u5f15\u7684\u7528\u9014<\/strong><\/p>\n<p>\u7d22\u5f15\u662f\u6570\u636e\u5e93\u4e2d\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u52a0\u5feb\u6570\u636e\u7684\u68c0\u7d22\u901f\u5ea6\u3002\u5b83\u901a\u8fc7\u5c06\u6570\u636e\u8868\u4e2d\u7684\u7279\u5b9a\u5217\u5efa\u7acb\u4e00\u4e2a\u5feb\u901f\u67e5\u627e\u7684\u6620\u5c04\uff0c\u51cf\u5c11\u4e86\u6570\u636e\u5e93\u5f15\u64ce\u9700\u8981\u626b\u63cf\u7684\u884c\u6570\u3002<\/p>\n<p><strong>\u521b\u5efa\u7d22\u5f15<\/strong><\/p>\n<p>\u4f7f\u7528 CREATE INDEX \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre>CREATE INDEX index_name ON table_name (column_name);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>\u7d22\u5f15\u7c7b\u578b<\/strong><\/p>\n<p>\u4e0d\u540c\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u652f\u6301\u4e0d\u540c\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u5176\u4e2d\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\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u8303\u56f4\u5185\u7684\u503c\u3002<\/li>\n<li> <strong>\u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u552f\u4e00\u503c\uff0c\u4f46\u65e0\u6cd5\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\u3002<\/li>\n<li> <strong>\u5168\u6587\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5bf9\u6587\u672c\u5b57\u6bb5\u8fdb\u884c\u5168\u6587\u641c\u7d22\u3002<\/li>\n<\/ul>\n<p><strong>\u9009\u62e9\u5408\u9002\u7d22\u5f15\u7684\u5217<\/strong><\/p>\n<p>\u9009\u62e9\u7d22\u5f15\u5217\u65f6\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u7ecf\u5e38\u88ab\u7528\u4e8e\u6761\u4ef6\u641c\u7d22\u7684\u5217<\/li>\n<li>\u5177\u6709\u8f83\u9ad8\u57fa\u6570\uff08\u4e0d\u540c\u503c\u6570\u91cf\uff09\u7684\u5217<\/li>\n<li>\u5217\u4e2d\u7684\u6570\u636e\u5206\u5e03\u5747\u5300<\/li>\n<\/ul>\n<p><strong>\u7ef4\u62a4\u7d22\u5f15<\/strong><\/p>\n<p>\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u6570\u636e\u8868\u4e2d\u7684\u6570\u636e\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u6b64\u9700\u8981\u7ef4\u62a4\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u3002\u6570\u636e\u5e93\u5f15\u64ce\u901a\u5e38\u4f1a\u5728\u6570\u636e\u8868\u66f4\u65b0\u65f6\u81ea\u52a8\u66f4\u65b0\u7d22\u5f15\uff0c\u4f46\u4e5f\u53ef\u4ee5\u624b\u52a8\u5f3a\u5236\u66f4\u65b0\u7d22\u5f15\uff1a<\/p>\n<pre>REBUILD INDEX index_name;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p><strong>\u4f7f\u7528\u7d22\u5f15\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n<ul>\n<li>\u4e0d\u8981\u5bf9\u6bcf\u4e2a\u5217\u90fd\u521b\u5efa\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u964d\u4f4e\u6027\u80fd\u3002<\/li>\n<li>\u907f\u514d\u5728\u7ecf\u5e38\u66f4\u65b0\u7684\u5217\u4e0a\u521b\u5efa\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u589e\u52a0\u7ef4\u62a4\u6210\u672c\u3002<\/li>\n<li>\u4f7f\u7528\u590d\u5408\u7d22\u5f15\uff08\u591a\u4e2a\u5217\u7684\u7d22\u5f15\uff09\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>\u76d1\u63a7\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fsql\u600e\u4e48\u4f7f\u7528\u7d22\u5f15\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>\u7d22\u5f15\u662f\u6570\u636e\u5e93\u4e2d\u7528\u4e8e\u52a0\u5feb\u6570\u636e\u68c0\u7d22\u7684\u7279\u6b8a\u6570\u636e\u7ed3\u6784\u3002\u521b\u5efa\u7d22\u5f15\u65f6\uff0c\u4f7f\u7528 create index \u8bed\u53e5\u5728\u8868\u4e2d\u6307\u5b9a\u8981\u7d22\u5f15\u7684\u5217\u3002\u7d22\u5f15\u7c7b\u578b\u5305\u62ec\uff1ab-tree \u7d22\u5f15\uff08\u8303\u56f4\u67e5\u627e\uff09\u3001\u54c8\u5e0c\u7d22\u5f15\uff08\u552f\u4e00\u503c\u67e5\u627e\uff09\u548c\u5168\u6587\u7d22\u5f15\uff08\u6587\u672c\u641c\u7d22\uff09\u3002\u9009\u62e9\u7d22\u5f15\u5217\u65f6\uff0c\u5e94\u8003\u8651\u7ecf\u5e38\u7528\u4e8e\u641c\u7d22\u3001\u57fa\u6570\u9ad8\u548c\u6570\u636e\u5206\u5e03\u5747\u5300\u7684\u5217\u3002\u5b9a\u671f\u7ef4\u62a4\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c\uff0c\u5e76\u6839\u636e\u9700\u8981\u4f7f\u7528\u590d\u5408\u7d22\u5f15\u3001\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u548c\u4f18\u5316\u7d22\u5f15\u6765\u63d0\u5347\u6027\u80fd\u3002 \u5982\u4f55\u4f7f\u7528 SQL \u7d22\u5f15 \u7d22\u5f15\u7684\u7528\u9014 \u7d22\u5f15\u662f\u6570\u636e\u5e93\u4e2d\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u52a0\u5feb\u6570\u636e\u7684\u68c0\u7d22\u901f\u5ea6\u3002\u5b83\u901a\u8fc7\u5c06\u6570\u636e\u8868\u4e2d\u7684\u7279\u5b9a\u5217\u5efa\u7acb\u4e00\u4e2a\u5feb\u901f\u67e5\u627e\u7684\u6620\u5c04\uff0c\u51cf\u5c11\u4e86\u6570\u636e\u5e93\u5f15\u64ce\u9700\u8981\u626b\u63cf\u7684\u884c\u6570\u3002 \u521b\u5efa\u7d22\u5f15 \u4f7f\u7528 CREATE INDEX \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\uff1a CREATE INDEX index_name ON table_name (column_name); \u767b\u5f55\u540e\u590d\u5236 \u7d22\u5f15\u7c7b\u578b \u4e0d\u540c\u7684\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u652f\u6301\u4e0d\u540c\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u5176\u4e2d\u6700\u5e38\u89c1\u7684\u6709\uff1a B-Tree \u7d22\u5f15\uff1a\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u8303\u56f4\u5185\u7684\u503c\u3002 \u54c8\u5e0c\u7d22\u5f15\uff1a\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u552f\u4e00\u503c\uff0c\u4f46\u65e0\u6cd5\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\u3002 \u5168\u6587\u7d22\u5f15\uff1a\u7528\u4e8e\u5bf9\u6587\u672c\u5b57\u6bb5\u8fdb\u884c\u5168\u6587\u641c\u7d22\u3002 \u9009\u62e9\u5408\u9002\u7d22\u5f15\u7684\u5217 \u9009\u62e9\u7d22\u5f15\u5217\u65f6\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a \u7ecf\u5e38\u88ab\u7528\u4e8e\u6761\u4ef6\u641c\u7d22\u7684\u5217 \u5177\u6709\u8f83\u9ad8\u57fa\u6570\uff08\u4e0d\u540c\u503c\u6570\u91cf\uff09\u7684\u5217 \u5217\u4e2d\u7684\u6570\u636e\u5206\u5e03\u5747\u5300 \u7ef4\u62a4\u7d22\u5f15 \u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0c\u6570\u636e\u8868\u4e2d\u7684\u6570\u636e\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u6b64\u9700\u8981\u7ef4\u62a4\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c\u3002\u6570\u636e\u5e93\u5f15\u64ce\u901a\u5e38\u4f1a\u5728\u6570\u636e\u8868\u66f4\u65b0\u65f6\u81ea\u52a8\u66f4\u65b0\u7d22\u5f15\uff0c\u4f46\u4e5f\u53ef\u4ee5\u624b\u52a8\u5f3a\u5236\u66f4\u65b0\u7d22\u5f15\uff1a REBUILD INDEX index_name; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u7d22\u5f15\u7684\u6700\u4f73\u5b9e\u8df5 \u4e0d\u8981\u5bf9\u6bcf\u4e2a\u5217\u90fd\u521b\u5efa\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u964d\u4f4e\u6027\u80fd\u3002 \u907f\u514d\u5728\u7ecf\u5e38\u66f4\u65b0\u7684\u5217\u4e0a\u521b\u5efa\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u589e\u52a0\u7ef4\u62a4\u6210\u672c\u3002 \u4f7f\u7528\u590d\u5408\u7d22\u5f15\uff08\u591a\u4e2a\u5217\u7684\u7d22\u5f15\uff09\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u6027\u80fd\u3002 \u76d1\u63a7\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002 \u4ee5\u4e0a\u5c31\u662fsql\u600e\u4e48\u4f7f\u7528\u7d22\u5f15\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-5684","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5684","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=5684"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5684\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}