{"id":157458,"date":"2024-11-02T23:15:21","date_gmt":"2024-11-02T15:15:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/157458\/"},"modified":"2024-11-02T23:15:22","modified_gmt":"2024-11-02T15:15:22","slug":"%e9%ab%98%e7%b4%9a-sql-%e5%84%aa%e5%8c%96%e4%b9%8b%e5%88%86%e7%b5%84%e5%ad%97%e6%ae%b5%e9%a0%86%e5%ba%8f%e5%84%aa%e5%8c%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/157458\/","title":{"rendered":"\u9ad8\u7d1a SQL \u512a\u5316\u4e4b\u5206\u7d44\u5b57\u6bb5\u9806\u5e8f\u512a\u5316"},"content":{"rendered":"<h1 id=\"%e9%ab%98%e7%b4%9a-sql-%e5%84%aa%e5%8c%96%e4%b9%8b%e5%88%86%e7%b5%84%e5%ad%97%e6%ae%b5%e9%a0%86%e5%ba%8f%e5%84%aa%e5%8c%96-EfRyGZWodf\">\u9ad8\u7d1a SQL \u512a\u5316\u4e4b\u5206\u7d44\u5b57\u6bb5\u9806\u5e8f\u512a\u5316<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL \u67e5\u8a62\u7684\u6027\u80fd\u512a\u5316\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u8ab2\u984c\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u67e5\u8a62\u7684\u6548\u7387\u76f4\u63a5\u5f71\u97ff\u5230\u61c9\u7528\u7a0b\u5e8f\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u6574\u9ad4\u6027\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u9ad8\u7d1a SQL \u512a\u5316\u6280\u8853\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u65b9\u9762\uff1a\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u512a\u5316\u3002<\/p>\n<h2 id=\"%e5%88%86%e7%b5%84%e5%ad%97%e6%ae%b5%e7%9a%84%e6%a6%82%e5%bf%b5-EfRyGZWodf\">\u5206\u7d44\u5b57\u6bb5\u7684\u6982\u5ff5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u5206\u7d44\u5b57\u6bb5\u901a\u5e38\u662f\u6307\u5728\u4f7f\u7528 <code>GROUP BY<\/code> \u5b50\u53e5\u6642\u6240\u6307\u5b9a\u7684\u5b57\u6bb5\u3002\u9019\u4e9b\u5b57\u6bb5\u7528\u65bc\u5c07\u67e5\u8a62\u7d50\u679c\u96c6\u4e2d\u7684\u6578\u64da\u9032\u884c\u5206\u7d44\uff0c\u4ee5\u4fbf\u9032\u884c\u805a\u5408\u8a08\u7b97\uff08\u5982\u8a08\u7b97\u7e3d\u548c\u3001\u5e73\u5747\u503c\u7b49\uff09\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8a62\u5c07\u6839\u64da\u5ba2\u6236\u7684\u5730\u5340\u9032\u884c\u5206\u7d44\uff0c\u4e26\u8a08\u7b97\u6bcf\u500b\u5730\u5340\u7684\u92b7\u552e\u7e3d\u984d\uff1a<\/p>\n<pre><code>SELECT region, SUM(sales) \nFROM sales_data \nGROUP BY region;<\/code><\/pre>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e5%88%86%e7%b5%84%e5%ad%97%e6%ae%b5%e7%9a%84%e9%a0%86%e5%ba%8f%e9%87%8d%e8%a6%81-EfRyGZWodf\">\u70ba\u4ec0\u9ebc\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u91cd\u8981<\/h2>\n<p>\u5728 SQL \u67e5\u8a62\u4e2d\uff0c\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u6027\u80fd\u3002\u7576\u6578\u64da\u5eab\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u5b83\u6703\u6839\u64da\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u4f86\u6c7a\u5b9a\u5982\u4f55\u8655\u7406\u6578\u64da\u3002\u9019\u610f\u5473\u8457\uff0c\u9078\u64c7\u5408\u9069\u7684\u5b57\u6bb5\u9806\u5e8f\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002<\/p>\n<h3 id=\"%e5%bd%b1%e9%9f%bf%e6%80%a7%e8%83%bd%e7%9a%84%e5%9b%a0%e7%b4%a0-EfRyGZWodf\">\u5f71\u97ff\u6027\u80fd\u7684\u56e0\u7d20<\/h3>\n<ul>\n<li><strong>\u7d22\u5f15\u7684\u4f7f\u7528\uff1a<\/strong>\u5982\u679c\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u8207\u7d22\u5f15\u7684\u9806\u5e8f\u4e00\u81f4\uff0c\u6578\u64da\u5eab\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\u3002<\/li>\n<li><strong>\u6578\u64da\u7684\u5206\u4f48\uff1a<\/strong>\u6839\u64da\u6578\u64da\u7684\u5206\u4f48\u60c5\u6cc1\uff0c\u67d0\u4e9b\u5b57\u6bb5\u53ef\u80fd\u6703\u5c0e\u81f4\u66f4\u5c11\u7684\u5206\u7d44\uff0c\u5f9e\u800c\u6e1b\u5c11\u8a08\u7b97\u7684\u8ca0\u64d4\u3002<\/li>\n<li><strong>\u805a\u5408\u51fd\u6578\u7684\u8a08\u7b97\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u5148\u9032\u884c\u67d0\u4e9b\u805a\u5408\u8a08\u7b97\u53ef\u4ee5\u6e1b\u5c11\u5f8c\u7e8c\u8a08\u7b97\u7684\u6578\u91cf\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%88%86%e7%b5%84%e5%ad%97%e6%ae%b5%e9%a0%86%e5%ba%8f%e5%84%aa%e5%8c%96%e7%9a%84%e5%af%a6%e8%b8%90-EfRyGZWodf\">\u5206\u7d44\u5b57\u6bb5\u9806\u5e8f\u512a\u5316\u7684\u5be6\u8e10<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u5206\u7d44\u5b57\u6bb5\u9806\u5e8f\u7684\u5be6\u8e10\u5efa\u8b70\uff1a<\/p>\n<h3 id=\"1-%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e8%a8%88%e5%8a%83-EfRyGZWodf\">1. \u5206\u6790\u67e5\u8a62\u8a08\u5283<\/h3>\n<p>\u4f7f\u7528\u6578\u64da\u5eab\u63d0\u4f9b\u7684\u67e5\u8a62\u8a08\u5283\u5206\u6790\u5de5\u5177\uff0c\u67e5\u770b\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u9019\u53ef\u4ee5\u5e6b\u52a9\u4f60\u4e86\u89e3\u6578\u64da\u5eab\u662f\u5982\u4f55\u8655\u7406\u67e5\u8a62\u7684\uff0c\u4e26\u627e\u51fa\u6f5b\u5728\u7684\u6027\u80fd\u74f6\u9838\u3002<\/p>\n<h3 id=\"2-%e6%b8%ac%e8%a9%a6%e4%b8%8d%e5%90%8c%e7%9a%84%e5%ad%97%e6%ae%b5%e9%a0%86%e5%ba%8f-EfRyGZWodf\">2. \u6e2c\u8a66\u4e0d\u540c\u7684\u5b57\u6bb5\u9806\u5e8f<\/h3>\n<p>\u5c0d\u65bc\u540c\u4e00\u67e5\u8a62\uff0c\u5617\u8a66\u4e0d\u540c\u7684\u5206\u7d44\u5b57\u6bb5\u9806\u5e8f\uff0c\u4e26\u6e2c\u91cf\u57f7\u884c\u6642\u9593\u3002\u9019\u6a23\u53ef\u4ee5\u627e\u51fa\u6700\u4f73\u7684\u5b57\u6bb5\u9806\u5e8f\u3002<\/p>\n<pre><code>SELECT region, SUM(sales) \nFROM sales_data \nGROUP BY region, product;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6839\u64da\u5be6\u969b\u6578\u64da\u7684\u5206\u4f48\uff0c\u53ef\u80fd\u6703\u767c\u73fe <code>GROUP BY product, region<\/code> \u7684\u6027\u80fd\u66f4\u4f73\u3002<\/p>\n<h3 id=\"3-%e8%80%83%e6%85%ae%e6%95%b8%e6%93%9a%e7%9a%84%e5%88%86%e4%bd%88-EfRyGZWodf\">3. \u8003\u616e\u6578\u64da\u7684\u5206\u4f48<\/h3>\n<p>\u5728\u9078\u64c7\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u6642\uff0c\u8003\u616e\u6578\u64da\u7684\u5206\u4f48\u60c5\u6cc1\u3002\u5982\u679c\u67d0\u500b\u5b57\u6bb5\u7684\u552f\u4e00\u503c\u8f03\u5c11\uff0c\u5c07\u5176\u653e\u5728\u524d\u9762\u53ef\u80fd\u6703\u66f4\u6709\u6548\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-EfRyGZWodf\">\u7d50\u8ad6<\/h2>\n<p>\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\u512a\u5316\u662f SQL \u67e5\u8a62\u6027\u80fd\u512a\u5316\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u65b9\u9762\u3002\u901a\u904e\u5408\u7406\u9078\u64c7\u5206\u7d44\u5b57\u6bb5\u7684\u9806\u5e8f\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9019\u4e00\u9ede\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u9ad8\u7d1a SQL \u512a\u5316\u6280\u8853\uff0c\u4e86\u89e3\u5982\u4f55\u901a\u904e\u8abf\u6574\u5206\u7d44\u5b57\u6bb5\u9806\u5e8f\u4f86\u63d0\u5347\u67e5\u8a62\u6027\u80fd\uff0c\u5be6\u73fe\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\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-157458","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157458","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=157458"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157458\/revisions"}],"predecessor-version":[{"id":157459,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/157458\/revisions\/157459"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=157458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=157458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=157458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}