{"id":217788,"date":"2023-12-23T00:16:20","date_gmt":"2023-12-22T16:16:20","guid":{"rendered":"https:\/\/www.idc.net\/help\/217788\/"},"modified":"2023-12-23T00:16:20","modified_gmt":"2023-12-22T16:16:20","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8sum%e5%87%bd%e6%95%b0%e8%bf%94%e5%9b%9e%e6%95%b0%e5%ad%97%e5%88%97%e7%9a%84%e6%80%bb%e5%92%8c","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217788\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528SUM()\u51fd\u6570\u8fd4\u56de\u6570\u5b57\u5217\u7684\u603b\u548c"},"content":{"rendered":"<p><title id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8sum%e5%87%bd%e6%95%b0%e8%bf%94%e5%9b%9e%e6%95%b0%e5%ad%97%e5%88%97%e7%9a%84%e6%80%bb%e5%92%8c-nqTQYGHETD\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528SUM()\u51fd\u6570\u8fd4\u56de\u6570\u5b57\u5217\u7684\u603b\u548c<\/title><\/p>\n<h1 id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8sum%e5%87%bd%e6%95%b0%e8%bf%94%e5%9b%9e%e6%95%b0%e5%ad%97%e5%88%97%e7%9a%84%e6%80%bb%e5%92%8c-nqTQYGHETD\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528SUM()\u51fd\u6570\u8fd4\u56de\u6570\u5b57\u5217\u7684\u603b\u548c<\/h1>\n<h2 id=\"%e4%bb%8b%e7%bb%8d-nqTQYGHETD\">\u4ecb\u7ecd<\/h2>\n<p>MySQL\u662f\u4e00\u79cd\u6d41\u884c\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5e7f\u6cdb\u7528\u4e8eWeb\u5e94\u7528\u7a0b\u5e8f\u548c\u5176\u4ed6\u6570\u636e\u9a71\u52a8\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u3002SUM()\u51fd\u6570\u662fMySQL\u4e2d\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u805a\u5408\u51fd\u6570\uff0c\u7528\u4e8e\u8ba1\u7b97\u6570\u5b57\u5217\u7684\u603b\u548c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8sum%e5%87%bd%e6%95%b0-nqTQYGHETD\">\u4f7f\u7528SUM()\u51fd\u6570<\/h2>\n<p>\u8981\u4f7f\u7528SUM()\u51fd\u6570\uff0c\u60a8\u9700\u8981\u6307\u5b9a\u8981\u8ba1\u7b97\u603b\u548c\u7684\u6570\u5b57\u5217\u3002\u4ee5\u4e0b\u662fSUM()\u51fd\u6570\u7684\u57fa\u672c\u8bed\u6cd5\uff1a<\/p>\n<pre><code>SELECT SUM(column_name) FROM table_name;<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u4e2d\uff0c<code>column_name<\/code>\u662f\u8981\u8ba1\u7b97\u603b\u548c\u7684\u6570\u5b57\u5217\u7684\u540d\u79f0\uff0c<code>table_name<\/code>\u662f\u5305\u542b\u8be5\u5217\u7684\u8868\u7684\u540d\u79f0\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a<code>orders<\/code>\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u540d\u4e3a<code>amount<\/code>\u7684\u6570\u5b57\u5217\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8be2\u6765\u8ba1\u7b97<code>amount<\/code>\u5217\u7684\u603b\u548c\uff1a<\/p>\n<pre><code>SELECT SUM(amount) FROM orders;<\/code><\/pre>\n<p>\u8fd9\u5c06\u8fd4\u56de<code>amount<\/code>\u5217\u4e2d\u6240\u6709\u503c\u7684\u603b\u548c\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-nqTQYGHETD\">\u793a\u4f8b<\/h2>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u6765\u6f14\u793a\u5982\u4f55\u4f7f\u7528SUM()\u51fd\u6570\u3002<\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a<code>products<\/code>\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u540d\u4e3a<code>price<\/code>\u7684\u6570\u5b57\u5217\uff0c\u8be5\u5217\u5b58\u50a8\u4e86\u4ea7\u54c1\u7684\u4ef7\u683c\u3002\u6211\u4eec\u60f3\u8981\u8ba1\u7b97\u6240\u6709\u4ea7\u54c1\u4ef7\u683c\u7684\u603b\u548c\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u7684\u67e5\u8be2\uff1a<\/p>\n<pre><code>SELECT SUM(price) FROM products;<\/code><\/pre>\n<p>\u8fd9\u5c06\u8fd4\u56de<code>price<\/code>\u5217\u4e2d\u6240\u6709\u4ea7\u54c1\u4ef7\u683c\u7684\u603b\u548c\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-nqTQYGHETD\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528MySQL\u7684SUM()\u51fd\u6570\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u8ba1\u7b97\u6570\u5b57\u5217\u7684\u603b\u548c\u3002\u8fd9\u5bf9\u4e8e\u5904\u7406\u5927\u91cf\u6570\u636e\u548c\u751f\u6210\u62a5\u544a\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u5982\u679c\u60a8\u60f3\u4e86\u89e3\u66f4\u591a\u5173\u4e8eMySQL\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u65b9\u7f51\u7ad9\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u3002\u6211\u4eec\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u4ea7\u54c1\uff0c\u4e3a\u60a8\u7684\u4e1a\u52a1\u63d0\u4f9b\u53ef\u9760\u7684\u6258\u7ba1\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528SUM()\u51fd\u6570\u8fd4\u56de\u6570\u5b57\u5217\u7684\u603b\u548c MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528SUM()\u51fd\u6570\u8fd4\u56de\u6570\u5b57\u5217\u7684\u603b\u548c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217788","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217788"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217788\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}