{"id":79920,"date":"2024-10-16T13:43:49","date_gmt":"2024-10-16T05:43:49","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79920\/"},"modified":"2024-10-16T13:43:49","modified_gmt":"2024-10-16T05:43:49","slug":"mysql%e6%8c%87%e4%bb%a4-sum%ef%bc%88%e6%b1%82%e5%92%8c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79920\/","title":{"rendered":"MySQL\u6307\u4ee4: SUM()\uff08\u6c42\u548c\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-sum%ef%bc%88%e6%b1%82%e5%92%8c%ef%bc%89-ZoTRKjFBAS\">MySQL\u6307\u4ee4: SUM()\uff08\u6c42\u548c\uff09<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u5206\u6790\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fSUM()\u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u7684\u4e3b\u8981\u7528\u9014\u662f\u8a08\u7b97\u6578\u503c\u5217\u7684\u7e3d\u548c\uff0c\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u751f\u6210\u4f86\u8aaa\uff0cSUM()\u51fd\u6578\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002<\/p>\n<h2 id=\"sum%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-ZoTRKjFBAS\">SUM()\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>SUM()\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT SUM(column_name) FROM table_name WHERE condition;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>column_name<\/code>\u662f\u4f60\u60f3\u8981\u6c42\u548c\u7684\u5217\u540d\uff0c<code>table_name<\/code>\u662f\u6578\u64da\u8868\u7684\u540d\u7a31\uff0c\u800c<code>condition<\/code>\u5247\u662f\u53ef\u9078\u7684\u689d\u4ef6\uff0c\u7528\u65bc\u904e\u6ffe\u6578\u64da\u3002<\/p>\n<h2 id=\"sum%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-ZoTRKjFBAS\">SUM()\u51fd\u6578\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528SUM()\u51fd\u6578\u7684\u5be6\u969b\u7bc4\u4f8b\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>sales<\/code>\u7684\u6578\u64da\u8868\uff0c\u8a72\u8868\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n<ul>\n<li><code>id<\/code> &#8211; \u92b7\u552e\u8a18\u9304\u7684\u552f\u4e00\u6a19\u8b58<\/li>\n<li><code>amount<\/code> &#8211; \u92b7\u552e\u91d1\u984d<\/li>\n<li><code>date<\/code> &#8211; \u92b7\u552e\u65e5\u671f<\/li>\n<\/ul>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u8a08\u7b97\u67d0\u500b\u7279\u5b9a\u65e5\u671f\u7bc4\u570d\u5167\u7684\u7e3d\u92b7\u552e\u91d1\u984d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT SUM(amount) AS total_sales \nFROM sales \nWHERE date BETWEEN '2023-01-01' AND '2023-01-31';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de2023\u5e741\u67081\u65e5\u81f32023\u5e741\u670831\u65e5\u4e4b\u9593\u7684\u7e3d\u92b7\u552e\u91d1\u984d\uff0c\u4e26\u5c07\u5176\u547d\u540d\u70ba<code>total_sales<\/code>\u3002<\/p>\n<h2 id=\"sum%e5%87%bd%e6%95%b8%e7%9a%84%e9%80%b2%e9%9a%8e%e7%94%a8%e6%b3%95-ZoTRKjFBAS\">SUM()\u51fd\u6578\u7684\u9032\u968e\u7528\u6cd5<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u6c42\u548c\u529f\u80fd\uff0cSUM()\u51fd\u6578\u9084\u53ef\u4ee5\u8207\u5176\u4ed6\u805a\u5408\u51fd\u6578\u548c\u5206\u7d44\u67e5\u8a62\u7d50\u5408\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u6309\u6708\u4efd\u8a08\u7b97\u6bcf\u500b\u6708\u7684\u7e3d\u92b7\u552e\u91d1\u984d\uff0c\u53ef\u4ee5\u4f7f\u7528GROUP BY\u5b50\u53e5\uff1a<\/p>\n<pre><code>SELECT MONTH(date) AS sale_month, SUM(amount) AS total_sales \nFROM sales \nGROUP BY MONTH(date);<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u6708\u4efd\u7684\u7e3d\u92b7\u552e\u91d1\u984d\uff0c\u4e26\u5c07\u6708\u4efd\u548c\u7e3d\u91d1\u984d\u5206\u5225\u547d\u540d\u70ba<code>sale_month<\/code>\u548c<code>total_sales<\/code>\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ZoTRKjFBAS\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528SUM()\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>SUM()\u51fd\u6578\u53ea\u5c0d\u6578\u503c\u578b\u6578\u64da\u6709\u6548\uff0c\u5c0d\u65bc\u975e\u6578\u503c\u578b\u6578\u64da\u5c07\u8fd4\u56deNULL\u3002<\/li>\n<li>\u5982\u679c\u5728\u67e5\u8a62\u4e2d\u6c92\u6709\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\uff0cSUM()\u51fd\u6578\u5c07\u8fd4\u56deNULL\uff0c\u800c\u4e0d\u662f0\u3002<\/li>\n<li>\u5728\u4f7f\u7528GROUP BY\u6642\uff0c\u6240\u6709\u672a\u805a\u5408\u7684\u5217\u5fc5\u9808\u51fa\u73fe\u5728GROUP BY\u5b50\u53e5\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ZoTRKjFBAS\">\u7e3d\u7d50<\/h2>\n<p>SUM()\u51fd\u6578\u5728MySQL\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u8a08\u7b97\u6578\u64da\u7684\u7e3d\u548c\u3002\u7121\u8ad6\u662f\u5728\u751f\u6210\u5831\u544a\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\u6642\uff0c\u638c\u63e1SUM()\u51fd\u6578\u7684\u4f7f\u7528\u90fd\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u900f\u904e\u672c\u7bc7\u6587\u7ae0\u7684\u4ecb\u7d39\uff0c\u5e0c\u671b\u80fd\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u61c9\u7528SUM()\u51fd\u6578\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684SUM()\u51fd\u6570\uff0c\u8f7b\u677e\u8ba1\u7b97\u6570\u636e\u96c6\u4e2d\u7684\u6570\u503c\u603b\u548c\uff0c\u63d0\u5347\u6570\u636e\u5206\u6790\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-79920","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79920","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=79920"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79920\/revisions"}],"predecessor-version":[{"id":79921,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79920\/revisions\/79921"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}