{"id":199616,"date":"2025-05-06T09:34:48","date_gmt":"2025-05-06T01:34:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199616\/"},"modified":"2025-05-06T09:34:48","modified_gmt":"2025-05-06T01:34:48","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e8%af%ad%e5%8f%a5%e5%9c%a8mysql%e4%b8%ad%e8%bf%9b%e8%a1%8c%e5%a4%8d%e6%9d%82%e7%9a%84%e6%95%b0%e6%8d%ae%e8%ae%a1%e7%ae%97%e5%92%8c%e5%a4%84%e7%90%86%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199616\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u8ba1\u7b97\u548c\u5904\u7406\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u8ba1\u7b97\u548c\u5904\u7406\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

MySQL\u662f\u4e00\u6b3e\u6d41\u884c\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5b83\u4e0d\u4ec5\u63d0\u4f9b\u4e86\u57fa\u672c\u6570\u636e\u64cd\u4f5c\u529f\u80fd\uff0c\u8fd8\u652f\u6301\u590d\u6742\u7684\u6570\u636e\u8ba1\u7b97\u548c\u5904\u7406\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u8ba1\u7b97\u548c\u5904\u7406\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u4f7f\u7528\u805a\u5408\u51fd\u6570\u8fdb\u884c\u6570\u636e\u8ba1\u7b97<\/li>\n<\/ol>\n

    MySQL\u63d0\u4f9b\u4e86\u4e00\u7ec4\u805a\u5408\u51fd\u6570\uff0c\u7528\u4e8e\u5bf9\u4e00\u7ec4\u6570\u636e\u8fdb\u884c\u8ba1\u7b97\uff0c\u5f97\u5230\u4e00\u4e2a\u6c47\u603b\u7ed3\u679c\u3002\u5e38\u7528\u7684\u805a\u5408\u51fd\u6570\u5305\u62ec\uff1aSUM\u3001AVG\u3001MIN\u3001MAX\u548cCOUNT\u7b49\u3002\u4e0b\u9762\u662f\u4f7f\u7528\u8fd9\u4e9b\u805a\u5408\u51fd\u6570\u8fdb\u884c\u6570\u636e\u8ba1\u7b97\u7684\u793a\u4f8b\uff1a<\/p>\n

    1.1 \u8ba1\u7b97\u6240\u6709\u8ba2\u5355\u7684\u603b\u91d1\u989d<\/p>\n

    SELECT SUM(total_price) AS total_sum FROM orders;<\/pre>\n
    1.2 \u8ba1\u7b97\u6240\u6709\u8ba2\u5355\u7684\u5e73\u5747\u91d1\u989d<\/p>\n
    SELECT AVG(total_price) AS avg_price FROM orders;<\/pre>\n
    1.3 \u8ba1\u7b97\u6700\u5927\u8ba2\u5355\u91d1\u989d\u548c\u5bf9\u5e94\u7684\u5ba2\u6237ID<\/p>\n
    SELECT MAX(total_price) AS max_price, customer_id FROM orders GROUP BY customer_id ORDER BY max_price DESC LIMIT 1;<\/pre>\n
      \n
    1. \u4f7f\u7528\u5b50\u67e5\u8be2\u8fdb\u884c\u6570\u636e\u5904\u7406<\/li>\n<\/ol>\n
      \u5b50\u67e5\u8be2\u662f\u4e00\u6761\u5d4c\u5957\u5728\u53e6\u4e00\u6761SQL\u8bed\u53e5\u4e2d\u7684\u67e5\u8be2\u8bed\u53e5\uff0c\u53ef\u4ee5\u8fdb\u884c\u6570\u636e\u7684\u5206\u7ec4\u5904\u7406\u3001\u7b5b\u9009\u548c\u8ba1\u7b97\u3002\u4e0b\u9762\u662f\u4f7f\u7528\u5b50\u67e5\u8be2\u8fdb\u884c\u6570\u636e\u5904\u7406\u7684\u793a\u4f8b\uff1a<\/p>\n
      2.1 \u8ba1\u7b97\u6bcf\u4e2a\u5ba2\u6237\u7684\u6700\u65b0\u8ba2\u5355\u91d1\u989d<\/p>\n
      SELECT customer_id, total_price \nFROM orders \nWHERE (customer_id, created_at) IN (SELECT customer_id, MAX(created_at) FROM orders GROUP BY customer_id);<\/pre>\n
      2.2 \u5220\u9664\u8ba2\u5355\u603b\u91d1\u989d\u5c0f\u4e8e100\u7684\u5ba2\u6237<\/p>\n
      DELETE FROM customers WHERE id IN (SELECT DISTINCT customer_id FROM orders GROUP BY customer_id HAVING SUM(total_price) < 100);<\/pre>\n
        \n
      1. \u4f7f\u7528\u8054\u8868\u67e5\u8be2\u8fdb\u884c\u591a\u8868\u6570\u636e\u5904\u7406<\/li>\n<\/ol>\n
        \u8054\u8868\u67e5\u8be2\u662f\u5c06\u591a\u4e2a\u8868\u6309\u7167\u5173\u8054\u5b57\u6bb5\u8fdb\u884c\u8fde\u63a5\u64cd\u4f5c\uff0c\u5f97\u5230\u76f8\u5173\u7684\u6570\u636e\u96c6\u5408\u3002\u8054\u8868\u67e5\u8be2\u53ef\u4ee5\u8fdb\u884c\u6570\u636e\u7684\u5408\u5e76\u3001\u7b5b\u9009\u548c\u8ba1\u7b97\u3002\u4e0b\u9762\u662f\u4f7f\u7528\u8054\u8868\u67e5\u8be2\u8fdb\u884c\u591a\u8868\u6570\u636e\u5904\u7406\u7684\u793a\u4f8b\uff1a<\/p>\n
        3.1 \u8ba1\u7b97\u6bcf\u4e2a\u5ba2\u6237\u7684\u603b\u8ba2\u5355\u91d1\u989d\u548c\u603b\u4ed8\u6b3e\u91d1\u989d<\/p>\n
        SELECT customers.id, customers.name, SUM(orders.total_price) AS total_order_sum, SUM(payments.amount) AS total_payment_sum \nFROM customers \nLEFT JOIN orders ON customers.id = orders.customer_id \nLEFT JOIN payments ON customers.id = payments.customer_id \nGROUP BY customers.id;<\/pre>\n
        3.2 \u67e5\u627e\u540c\u65f6\u4e0b\u8fc7\u4e24\u6b21\u4ee5\u4e0a\u8ba2\u5355\u7684\u5ba2\u6237<\/p>\n
        SELECT customer_id FROM orders GROUP BY customer_id HAVING COUNT(*) >= 2;<\/pre>\n
        \u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u8ba1\u7b97\u548c\u5904\u7406\uff0c\u5305\u62ec\u4f7f\u7528\u805a\u5408\u51fd\u6570\u3001\u5b50\u67e5\u8be2\u548c\u8054\u8868\u67e5\u8be2\u7b49\u6280\u672f\u3002\u901a\u8fc7\u8fd9\u4e9b\u6280\u672f\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u52a0\u9ad8\u6548\u5730\u5904\u7406\u5927\u89c4\u6a21\u7684\u6570\u636e\u5e93\u6570\u636e\uff0c\u5e76\u5f97\u5230\u6240\u9700\u7684\u7ed3\u679c\u3002<\/p>\n
        \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u8ba1\u7b97\u548c\u5904\u7406\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199616","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199616","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199616"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199616\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}