{"id":157858,"date":"2024-11-03T00:02:21","date_gmt":"2024-11-02T16:02:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/157858\/"},"modified":"2024-11-03T00:02:22","modified_gmt":"2024-11-02T16:02:22","slug":"%e9%ab%98%e6%95%88%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%94%af%e6%8c%81%e4%b8%8b%ef%bc%8c%e8%88%aa%e7%a9%ba%e5%94%ae%e7%a5%a8%e7%b3%bb%e7%b5%b1%e9%a3%9b%e9%80%9f%e8%b5%b7%e9%a3%9b%ef%bc%88%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/157858\/","title":{"rendered":"\u9ad8\u6548\u7684\u6578\u64da\u5eab\u652f\u6301\u4e0b\uff0c\u822a\u7a7a\u552e\u7968\u7cfb\u7d71\u98db\u901f\u8d77\u98db\uff08\u6578\u64da\u5eab\u822a\u7a7a\u552e\u7968\u7cfb\u7d71\uff09"},"content":{"rendered":"<h1 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id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96-wFnwsMuQMR\">\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316<\/h2>\n<p>\u70ba\u4e86\u78ba\u4fdd\u822a\u7a7a\u552e\u7968\u7cfb\u7d71\u7684\u9ad8\u6548\u904b\u884c\uff0c\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u512a\u5316\u7b56\u7565\uff1a<\/p>\n<h3 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e4%bd%bf%e7%94%a8-wFnwsMuQMR\">\u7d22\u5f15\u7684\u4f7f\u7528<\/h3>\n<p>\u901a\u904e\u70ba\u5e38\u7528\u67e5\u8a62\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u5305\u542b\u5927\u91cf\u822a\u73ed\u4fe1\u606f\u7684\u8868\u4e2d\uff0c\u5c0d\u822a\u73ed\u865f\u548c\u51fa\u767c\u65e5\u671f\u5b57\u6bb5\u5efa\u7acb\u7d22\u5f15\uff0c\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n<pre><code>CREATE INDEX idx_flight ON flights (flight_number, departure_date);<\/code><\/pre>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96-wFnwsMuQMR\">\u67e5\u8a62\u512a\u5316<\/h3>\n<p>\u7de8\u5beb\u9ad8\u6548\u7684SQL\u67e5\u8a62\u662f\u63d0\u5347\u6027\u80fd\u7684\u53e6\u4e00\u500b\u95dc\u9375\u3002\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u9078\u64c7\u9700\u8981\u7684\u5b57\u6bb5\uff0c\u4e26\u4f7f\u7528JOIN\u800c\u4e0d\u662f\u5b50\u67e5\u8a62\u4f86\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<pre><code>SELECT flight_number, departure_time FROM flights WHERE departure_date = '2023-10-01';<\/code><\/pre>\n<h3 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%86%e5%8d%80-wFnwsMuQMR\">\u6578\u64da\u5eab\u5206\u5340<\/h3>\n<p>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u6578\u64da\u5eab\u5206\u5340\u53ef\u4ee5\u5e6b\u52a9\u63d0\u9ad8\u6027\u80fd\u3002\u901a\u904e\u5c07\u6578\u64da\u5206\u6563\u5230\u4e0d\u540c\u7684\u7269\u7406\u5b58\u5132\u4e2d\uff0c\u53ef\u4ee5\u6e1b\u5c11\u67e5\u8a62\u7684\u8ca0\u64d4\u3002<\/p>\n<h2 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href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4e3b\u6a5f\u670d\u52d9\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9ad8\u6548\u6578\u64da\u5eab\u652f\u6301\u7684\u822a\u7a7a\u552e\u7968\u7cfb\u7d71\uff0c\u5be6\u73fe\u5feb\u901f\u8a02\u7968\u8207\u67e5\u8a62\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\uff0c\u52a9\u529b\u822a\u7a7a\u696d\u98db\u901f\u767c\u5c55\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-157858","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157858","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=157858"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157858\/revisions"}],"predecessor-version":[{"id":157859,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157858\/revisions\/157859"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=157858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=157858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=157858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}