{"id":27904,"date":"2024-11-24T11:56:13","date_gmt":"2024-11-24T03:56:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/27904\/"},"modified":"2024-11-24T11:56:13","modified_gmt":"2024-11-24T03:56:13","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-sql-%e5%8d%95%e8%af%ad%e5%8f%a5%e4%bb%8e%e5%a4%9a%e5%bc%a0%e8%a1%a8%e4%b8%ad%e5%88%a0%e9%99%a4%e6%95%b0%e6%8d%ae%ef%bc%8c%e5%8d%b3%e4%bd%bf%e5%85%b6%e4%b8%ad-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/27904\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 SQL \u5355\u8bed\u53e5\u4ece\u591a\u5f20\u8868\u4e2d\u5220\u9664\u6570\u636e\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u5f20\u8868\u6ca1\u6709\u5339\u914d\u9879\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173133167558904.jpg\" class=\"aligncenter\" title=\"\u5982\u4f55\u4f7f\u7528 SQL \u5355\u8bed\u53e5\u4ece\u591a\u5f20\u8868\u4e2d\u5220\u9664\u6570\u636e\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u5f20\u8868\u6ca1\u6709\u5339\u914d\u9879\uff1f\u63d2\u56fe\" alt=\"\u5982\u4f55\u4f7f\u7528 SQL \u5355\u8bed\u53e5\u4ece\u591a\u5f20\u8868\u4e2d\u5220\u9664\u6570\u636e\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u5f20\u8868\u6ca1\u6709\u5339\u914d\u9879\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>sql\u5355\u8bed\u53e5\u5b9e\u73b0\u591a\u8868\u5220\u9664<\/strong><\/p>\n<p>\u6b64\u5904\u8981\u5b9e\u73b0\u901a\u8fc7\u5355\u4e00\u8bed\u53e5\u4ece\u4e09\u5f20\u8868\u4e2d\u5220\u9664\u76f8\u5173\u8bb0\u5f55\uff0c\u76ee\u6807\u662f\u901a\u8fc7dishid\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002<\/p>\n<p>\u63d0\u4f9b\u7684\u521d\u59cb\u4e2d\uff0c\u4f7f\u7528\u4e86inner join\u8fde\u63a5\u4e09\u4e2a\u8868\uff0c\u4f46\u7531\u4e8e\u7b2c\u4e09\u5f20\u8868\u6ca1\u6709\u4efb\u4f55\u5339\u914d\u8bb0\u5f55\uff0c\u5bfc\u81f4\u524d\u4e24\u5f20\u8868\u7684\u6570\u636e\u672a\u88ab\u5220\u9664\u3002<\/p>\n<p>\u6b63\u786e\u7684\u6539\u8fdb\u65b9\u5f0f\u662f\u4f7f\u7528left join\u8fde\u63a5\uff0c\u5373\u4f7f\u7b2c\u4e09\u5f20\u8868\u6ca1\u6709\u5339\u914d\u8bb0\u5f55\uff0c\u4e5f\u80fd\u5220\u9664\u524d\u4e24\u5f20\u8868\u4e2d\u7684\u6570\u636e\u3002\u4fee\u6539\u540e\u7684sql\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n<pre>DELETE dish,\ndish_flavor,\nsetmeal_dish \nFROM\n    dish \n    LEFT JOIN dish_flavor ON dish.id = dish_flavor.id\n    LEFT JOIN setmeal_dish ON dish.id = setmeal_dish.id\nWHERE\n    dish.id IN ( 51, 52 );<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b64\u8bed\u53e5\u5c06\u6839\u636edishid\u5728\u6240\u6709\u4e09\u5f20\u8868\u4e2d\u5220\u9664\u76f8\u5173\u8bb0\u5f55\uff0c\u65e0\u8bba\u5176\u4e2d\u54ea\u5f20\u8868\u5b58\u5728\u8981\u5220\u9664\u7684\u6570\u636e\u3002<\/p>\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cinner join\u548cleft join\u4e4b\u95f4\u7684\u5728\u4e8e\uff0cinner join\u4ec5\u5339\u914d\u540c\u65f6\u5728\u6240\u6709\u8fde\u63a5\u8868\u4e2d\u627e\u5230\u5339\u914d\u9879\u7684\u8bb0\u5f55\uff0c\u800cleft join\u5c06\u8fd4\u56de\u6240\u6709\u5339\u914d\u4efb\u610f\u8fde\u63a5\u8868\u7684\u8bb0\u5f55\uff0c\u5373\u4f7f\u5176\u4ed6\u8fde\u63a5\u8868\u4e2d\u6ca1\u6709\u5339\u914d\u9879\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u4f7f\u7528 SQL \u5355\u8bed\u53e5\u4ece\u591a\u5f20\u8868\u4e2d\u5220\u9664\u6570\u636e\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u5f20\u8868\u6ca1\u6709\u5339\u914d\u9879\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sql\u5355\u8bed\u53e5\u5b9e\u73b0\u591a\u8868\u5220\u9664 \u6b64\u5904\u8981\u5b9e\u73b0\u901a\u8fc7\u5355\u4e00\u8bed\u53e5\u4ece\u4e09\u5f20\u8868\u4e2d\u5220\u9664\u76f8\u5173\u8bb0\u5f55\uff0c\u76ee\u6807\u662f\u901a\u8fc7dishid\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002 \u63d0\u4f9b\u7684\u521d\u59cb\u4e2d\uff0c\u4f7f\u7528\u4e86inner join\u8fde\u63a5\u4e09\u4e2a\u8868\uff0c\u4f46\u7531\u4e8e\u7b2c\u4e09\u5f20\u8868\u6ca1\u6709\u4efb\u4f55\u5339\u914d\u8bb0\u5f55\uff0c\u5bfc\u81f4\u524d\u4e24\u5f20\u8868\u7684\u6570\u636e\u672a\u88ab\u5220\u9664\u3002 \u6b63\u786e\u7684\u6539\u8fdb\u65b9\u5f0f\u662f\u4f7f\u7528left join\u8fde\u63a5\uff0c\u5373\u4f7f\u7b2c\u4e09\u5f20\u8868\u6ca1\u6709\u5339\u914d\u8bb0\u5f55\uff0c\u4e5f\u80fd\u5220\u9664\u524d\u4e24\u5f20\u8868\u4e2d\u7684\u6570\u636e\u3002\u4fee\u6539\u540e\u7684sql\u8bed\u53e5\u5982\u4e0b\uff1a DELETE dish, dish_flavor, setmeal_dish FROM dish LEFT JOIN dish_flavor ON dish.id = dish_flavor.id LEFT JOIN setmeal_dish ON dish.id = setmeal_dish.id WHERE dish.id IN ( 51, 52 ); \u767b\u5f55\u540e\u590d\u5236 \u6b64\u8bed\u53e5\u5c06\u6839\u636edishid\u5728\u6240\u6709\u4e09\u5f20\u8868\u4e2d\u5220\u9664\u76f8\u5173\u8bb0\u5f55\uff0c\u65e0\u8bba\u5176\u4e2d\u54ea\u5f20\u8868\u5b58\u5728\u8981\u5220\u9664\u7684\u6570\u636e\u3002 \u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cinner join\u548cleft join\u4e4b\u95f4\u7684\u5728\u4e8e\uff0cinner join\u4ec5\u5339\u914d\u540c\u65f6\u5728\u6240\u6709\u8fde\u63a5\u8868\u4e2d\u627e\u5230\u5339\u914d\u9879\u7684\u8bb0\u5f55\uff0c\u800cleft join\u5c06\u8fd4\u56de\u6240\u6709\u5339\u914d\u4efb\u610f\u8fde\u63a5\u8868\u7684\u8bb0\u5f55\uff0c\u5373\u4f7f\u5176\u4ed6\u8fde\u63a5\u8868\u4e2d\u6ca1\u6709\u5339\u914d\u9879\u3002 \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u4f7f\u7528 SQL \u5355\u8bed\u53e5\u4ece\u591a\u5f20\u8868\u4e2d\u5220\u9664\u6570\u636e\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u5f20\u8868\u6ca1\u6709\u5339\u914d\u9879\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-27904","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=27904"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27904\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=27904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=27904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=27904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}