{"id":217765,"date":"2023-12-22T23:53:29","date_gmt":"2023-12-22T15:53:29","guid":{"rendered":"https:\/\/www.idc.net\/help\/217765\/"},"modified":"2023-12-22T23:53:29","modified_gmt":"2023-12-22T15:53:29","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8group-by%e8%af%ad%e5%8f%a5%e5%b0%86%e6%8c%87%e5%ae%9a%e5%88%97%e4%b8%ad%e5%80%bc%e7%9b%b8%e5%90%8c%e7%9a%84%e8%a1%8c%e5%88%86","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217765\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528GROUP BY\u8bed\u53e5\u5c06\u6307\u5b9a\u5217\u4e2d\u503c\u76f8\u540c\u7684\u884c\u5206\u7ec4\u4e3a\u6c47\u603b\u6570\u636e"},"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%a8group-by%e8%af%ad%e5%8f%a5%e5%b0%86%e6%8c%87%e5%ae%9a%e5%88%97%e4%b8%ad%e5%80%bc%e7%9b%b8%e5%90%8c%e7%9a%84%e8%a1%8c%e5%88%86-pMRKbyWjSb\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528GROUP BY\u8bed\u53e5\u5c06\u6307\u5b9a\u5217\u4e2d\u503c\u76f8\u540c\u7684\u884c\u5206\u7ec4\u4e3a\u6c47\u603b\u6570\u636e<\/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%a8group-by%e8%af%ad%e5%8f%a5%e5%b0%86%e6%8c%87%e5%ae%9a%e5%88%97%e4%b8%ad%e5%80%bc%e7%9b%b8%e5%90%8c%e7%9a%84%e8%a1%8c%e5%88%86-pMRKbyWjSb\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528GROUP BY\u8bed\u53e5\u5c06\u6307\u5b9a\u5217\u4e2d\u503c\u76f8\u540c\u7684\u884c\u5206\u7ec4\u4e3a\u6c47\u603b\u6570\u636e<\/h1>\n<p>MySQL\u662f\u4e00\u79cd\u6d41\u884c\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5e7f\u6cdb\u7528\u4e8e\u5404\u79cdWeb\u5e94\u7528\u7a0b\u5e8f\u548c\u7f51\u7ad9\u5f00\u53d1\u4e2d\u3002\u5728MySQL\u4e2d\uff0c\u4f7f\u7528GROUP BY\u8bed\u53e5\u53ef\u4ee5\u5c06\u6307\u5b9a\u5217\u4e2d\u503c\u76f8\u540c\u7684\u884c\u5206\u7ec4\u4e3a\u6c47\u603b\u6570\u636e\u3002<\/p>\n<h2 id=\"group-by%e8%af%ad%e5%8f%a5%e7%9a%84%e8%af%ad%e6%b3%95-pMRKbyWjSb\">GROUP BY\u8bed\u53e5\u7684\u8bed\u6cd5<\/h2>\n<p>GROUP BY\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table\nWHERE condition\nGROUP BY column1, column2, ...\nORDER BY column1, column2, ...;<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u8bed\u6cd5\u4e2d\uff0c<code>SELECT<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u8981\u67e5\u8be2\u7684\u5217\uff0c<code>FROM<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u8981\u67e5\u8be2\u7684\u8868\uff0c<code>WHERE<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u67e5\u8be2\u7684\u6761\u4ef6\uff0c<code>GROUP BY<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u8981\u5206\u7ec4\u7684\u5217\uff0c<code>ORDER BY<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u7ed3\u679c\u7684\u6392\u5e8f\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8group-by%e8%af%ad%e5%8f%a5%e8%bf%9b%e8%a1%8c%e5%88%86%e7%bb%84-pMRKbyWjSb\">\u4f7f\u7528GROUP BY\u8bed\u53e5\u8fdb\u884c\u5206\u7ec4<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a<code>orders<\/code>\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u8ba2\u5355\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u8ba2\u5355\u53f7\u3001\u5ba2\u6237ID\u548c\u8ba2\u5355\u91d1\u989d\u3002\u6211\u4eec\u60f3\u8981\u6309\u7167\u5ba2\u6237ID\u5c06\u8ba2\u5355\u8fdb\u884c\u5206\u7ec4\uff0c\u5e76\u8ba1\u7b97\u6bcf\u4e2a\u5ba2\u6237\u7684\u8ba2\u5355\u603b\u91d1\u989d\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528GROUP BY\u8bed\u53e5\u8fdb\u884c\u5206\u7ec4\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT customer_id, SUM(order_amount) AS total_amount\nFROM orders\nGROUP BY customer_id;<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>GROUP BY<\/code>\u5b50\u53e5\u5c06<code>orders<\/code>\u8868\u6309\u7167<code>customer_id<\/code>\u5217\u8fdb\u884c\u5206\u7ec4\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528<code>SUM<\/code>\u51fd\u6570\u8ba1\u7b97\u6bcf\u4e2a\u5ba2\u6237\u7684\u8ba2\u5355\u603b\u91d1\u989d\uff0c\u5e76\u5c06\u7ed3\u679c\u547d\u540d\u4e3a<code>total_amount<\/code>\u3002\u6700\u540e\uff0c\u6211\u4eec\u5f97\u5230\u4e86\u6bcf\u4e2a\u5ba2\u6237\u7684\u8ba2\u5355\u603b\u91d1\u989d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8group-by%e8%af%ad%e5%8f%a5%e8%bf%9b%e8%a1%8c%e5%88%86%e7%bb%84%e5%92%8c%e8%bf%87%e6%bb%a4-pMRKbyWjSb\">\u4f7f\u7528GROUP BY\u8bed\u53e5\u8fdb\u884c\u5206\u7ec4\u548c\u8fc7\u6ee4<\/h2>\n<p>\u9664\u4e86\u5206\u7ec4\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5728<code>GROUP BY<\/code>\u8bed\u53e5\u4e2d\u4f7f\u7528<code>HAVING<\/code>\u5b50\u53e5\u8fdb\u884c\u8fc7\u6ee4\u3002\u8fd9\u6837\u53ef\u4ee5\u7b5b\u9009\u51fa\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u5206\u7ec4\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528<code>HAVING<\/code>\u5b50\u53e5\u8fdb\u884c\u8fc7\u6ee4\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT customer_id, SUM(order_amount) AS total_amount\nFROM orders\nGROUP BY customer_id\nHAVING total_amount &gt; 1000;<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>HAVING<\/code>\u5b50\u53e5\u7b5b\u9009\u51fa\u8ba2\u5355\u603b\u91d1\u989d\u5927\u4e8e1000\u7684\u5206\u7ec4\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-pMRKbyWjSb\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528MySQL\u7684GROUP BY\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u6307\u5b9a\u5217\u4e2d\u503c\u76f8\u540c\u7684\u884c\u5206\u7ec4\u4e3a\u6c47\u603b\u6570\u636e\u3002\u8fd9\u5bf9\u4e8e\u7edf\u8ba1\u548c\u5206\u6790\u6570\u636e\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u4e91\u8ba1\u7b97\u670d\u52a1\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002\u4ed6\u4eec\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u591a\u79cd\u4ea7\u54c1\u3002\u60a8\u53ef\u4ee5\u5728<a href=\"https:\/\/idc.net\">\u540e\u6d6a\u4e91\u5b98\u7f51<\/a>\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528GROUP BY\u8bed\u53e5\u5c06\u6307\u5b9a\u5217\u4e2d\u503c\u76f8\u540c\u7684\u884c\u5206\u7ec4\u4e3a\u6c47\u603b\u6570\u636e MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528GRO [&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-217765","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217765","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=217765"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217765\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}