{"id":108,"date":"2020-06-10T14:57:27","date_gmt":"2020-06-10T06:57:27","guid":{"rendered":"http:\/\/blog.mrfai.cn\/?p=108"},"modified":"2020-06-10T14:58:46","modified_gmt":"2020-06-10T06:58:46","slug":"mysql%e4%bb%8e%e8%ae%a2%e5%8d%95%e8%a1%a8%e4%b8%ad%e6%89%be%e5%88%b0%e7%95%85%e9%94%80%e5%95%86%e5%93%81%e5%92%8c%e6%b6%88%e8%b4%b9%e6%9c%80%e5%a4%9a%e7%9a%84%e7%94%a8%e6%88%b7%ef%bc%8c%e5%b9%b6","status":"publish","type":"post","link":"https:\/\/blog.mrfai.cn\/index.php\/2020\/06\/10\/108\/","title":{"rendered":"(Mysql)\u4ece\u8ba2\u5355\u8868\u4e2d\u627e\u5230\u7545\u9500\u5546\u54c1\u548c\u6d88\u8d39\u6700\u591a\u7684\u7528\u6237\uff0c\u5e76\u4e14\u5bf9\u8ba2\u5355\u8868\u53bb\u91cd"},"content":{"rendered":"\n<p>\u67d0\u7f51\u7ad9\u5546\u54c1\u7684\u8d2d\u4e70\u8ba2\u5355\u8868\u4e3aorders\uff0c\u8868\u5b57\u6bb5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>id<\/td><td>\u81ea\u589eid<\/td><\/tr><tr><td>order_id<\/td><td>\u8ba2\u5355\u53f7id<\/td><\/tr><tr><td>user_id<\/td><td>\u7528\u6237id<\/td><\/tr><tr><td>product_id<\/td><td>\u5546\u54c1id<\/td><\/tr><tr><td>time<\/td><td>\u4e0b\u5355\u65f6\u95f4<\/td><\/tr><tr><td>price<\/td><td>\u8ba2\u5355\u603b\u4ef7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u627e\u51fa\u9500\u91cf\u5927\u4e8e500\u7684\u5546\u54c1\uff0c\u6309\u9500\u91cf\u6392\u5e8f\uff0c\u9500\u91cf\u9ad8\u7684\u5728\u524d\u3002<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT product_id,count(*) AS s FROM orders GROUP BY product_id HAVING s>500 ORDER BY s DESC;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u627e\u51fa\u6d88\u8d39\u6700\u591a\u768410\u4e2a\u7528\u6237\u3002<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT user_id,SUM(price) AS allprice FROM orders GROUP BY user_id ORDER BY allprice DESC LIMIT 10;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u5df2\u77e5\u67d0\u4e9b\u9519\u8bef\uff0c\u540c\u4e00\u4e2a\u8ba2\u5355\u63d2\u5165\u4e86\u591a\u6761\u91cd\u590d\u7684\u8bb0\u5f55\uff08\u8ba2\u5355\u53f7\u91cd\u590d\uff09\u3002<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">1\u3001\u628a\u6240\u6709\u91cd\u590d\u7684\u8ba2\u5355\u8bb0\u5f55\u5217\u51fa\u6765<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT order_id,COUNT(`order_id`) AS num FROM orders GROUP BY order_id HAVING num>1 ORDER BY num DESC;<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2\u3001\u53ea\u4fdd\u7559\u7b2c\u4e00\u6761\u8ba2\u5355\u8bb0\u5f55\uff0c\u5220\u9664\u6389\u5176\u5b83\u91cd\u590d\u7684\u8ba2\u5355<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM orders WHERE id NOT IN (\n    SELECT * FROM (\n         SELECT MIN(id) AS id FROM orders GROUP BY `order_id`\n     ) id\n);<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u67d0\u7f51\u7ad9\u5546\u54c1\u7684\u8d2d\u4e70\u8ba2\u5355\u8868\u4e3aorders\uff0c\u8868\u5b57\u6bb5\u5982\u4e0b\uff1a&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/blog.mrfai.cn\/index.php\/2020\/06\/10\/108\/\">Continue reading<span class=\"screen-reader-text\">(Mysql)\u4ece\u8ba2\u5355\u8868\u4e2d\u627e\u5230\u7545\u9500\u5546\u54c1\u548c\u6d88\u8d39\u6700\u591a\u7684\u7528\u6237\uff0c\u5e76\u4e14\u5bf9\u8ba2\u5355\u8868\u53bb\u91cd<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[20,19],"class_list":["post-108","post","type-post","status-publish","format-standard","hentry","category-databases","tag-databases","tag-mysql","entry"],"_links":{"self":[{"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/posts\/108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/comments?post=108"}],"version-history":[{"count":1,"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":109,"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/posts\/108\/revisions\/109"}],"wp:attachment":[{"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/media?parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/categories?post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.mrfai.cn\/index.php\/wp-json\/wp\/v2\/tags?post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}