{"id":6960,"date":"2024-11-14T11:38:09","date_gmt":"2024-11-14T03:38:09","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6960\/"},"modified":"2024-11-14T11:38:09","modified_gmt":"2024-11-14T03:38:09","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%a4%9a%e8%a1%a8-delete-%e8%af%ad%e5%8f%a5%e5%88%a0%e9%99%a4%e4%b8%a4%e4%b8%aa%e8%a1%a8%e4%b8%ad%e5%ad%97%e7%ac%a6%e9%9b%86%e7%9b%b8%e5%90%8c%e7%9a%84%e7%89%b9","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6960\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u591a\u8868 DELETE \u8bed\u53e5\u5220\u9664\u4e24\u4e2a\u8868\u4e2d\u5b57\u7b26\u96c6\u76f8\u540c\u7684\u7279\u5b9a\u6570\u636e\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173018610375466.jpg\" class=\"aligncenter\" title=\"\u5982\u4f55\u4f7f\u7528\u591a\u8868 DELETE \u8bed\u53e5\u5220\u9664\u4e24\u4e2a\u8868\u4e2d\u5b57\u7b26\u96c6\u76f8\u540c\u7684\u7279\u5b9a\u6570\u636e\uff1f\u63d2\u56fe\" alt=\"\u5982\u4f55\u4f7f\u7528\u591a\u8868 DELETE \u8bed\u53e5\u5220\u9664\u4e24\u4e2a\u8868\u4e2d\u5b57\u7b26\u96c6\u76f8\u540c\u7684\u7279\u5b9a\u6570\u636e\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728\u591a\u8868\u4e2d\u5220\u9664\u6307\u5b9a\u5b57\u7b26\u96c6\u7684\u76f8\u540c\u6570\u636e<\/strong><\/p>\n<p>\u9488\u5bf9\u8868 t1 \u548c t2 \u4e2d\u5305\u542b\u5b57\u7b26\u7f16\u7801\u4e3a gbk \u7684\u6570\u636e\uff0c\u9700\u8981\u5220\u9664\u5f62\u5982 &#8220;coco&#8221; \u7684\u6570\u636e\u3002\u540c\u65f6\uff0c\u4f7f\u7528 utf8mb4 \u6821\u5bf9\u96c6\u8fdb\u884c\u5bf9\u6bd4\u3002<\/p>\n<p>\u4e3a\u4e86\u6ee1\u8db3\u4e0a\u8ff0\u9700\u6c42\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u8868 delete \u8bed\u53e5\u3002\u8be5\u8bed\u53e5\u5141\u8bb8\u4e00\u6b21\u5220\u9664\u591a\u4e2a\u8868\u4e2d\u7684\u6570\u636e\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>delete [low_priority] [quick] [ignore]\nfrom tbl_name[.*] [, tbl_name[.*]] ...\nusing table_references\n[where where_condition]<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8981\u5220\u9664\u4e24\u4e2a\u8868\u4e2d\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u7f16\u5199\u4ee5\u4e0b\u8bed\u53e5\uff1a<\/p>\n<pre>DELETE\nFROM t1, t2\nUSING t1, t2\nWHERE\n  convert(t1.username USING utf8mb4) = convert(t2.username USING utf8mb4);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u6b64\u8bed\u53e5\u5c06\u4f7f\u7528 utf8mb4 \u6821\u5bf9\u96c6\u5bf9 t1 \u548c t2 \u8868\u4e2d\u7684\u7528\u6237\u540d\u8fdb\u884c\u6bd4\u8f83\uff0c\u5e76\u5220\u9664\u7b26\u5408\u6761\u4ef6\u7684\u6240\u6709\u884c\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u4f7f\u7528\u591a\u8868 DELETE \u8bed\u53e5\u5220\u9664\u4e24\u4e2a\u8868\u4e2d\u5b57\u7b26\u96c6\u76f8\u540c\u7684\u7279\u5b9a\u6570\u636e\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u5728\u591a\u8868\u4e2d\u5220\u9664\u6307\u5b9a\u5b57\u7b26\u96c6\u7684\u76f8\u540c\u6570\u636e \u9488\u5bf9\u8868 t1 \u548c t2 \u4e2d\u5305\u542b\u5b57\u7b26\u7f16\u7801\u4e3a gbk \u7684\u6570\u636e\uff0c\u9700\u8981\u5220\u9664\u5f62\u5982 &#8220;coco&#8221; \u7684\u6570\u636e\u3002\u540c\u65f6\uff0c\u4f7f\u7528 utf8mb4 \u6821\u5bf9\u96c6\u8fdb\u884c\u5bf9\u6bd4\u3002 \u4e3a\u4e86\u6ee1\u8db3\u4e0a\u8ff0\u9700\u6c42\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u8868 delete \u8bed\u53e5\u3002\u8be5\u8bed\u53e5\u5141\u8bb8\u4e00\u6b21\u5220\u9664\u591a\u4e2a\u8868\u4e2d\u7684\u6570\u636e\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a delete [low_priority] [quick] [ignore] from tbl_name[.*] [, tbl_name[.*]] &#8230; using table_references [where where_condition] \u767b\u5f55\u540e\u590d\u5236 \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8981\u5220\u9664\u4e24\u4e2a\u8868\u4e2d\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u7f16\u5199\u4ee5\u4e0b\u8bed\u53e5\uff1a DELETE FROM t1, t2 USING t1, t2 WHERE convert(t1.username USING utf8mb4) = convert(t2.username USING utf8mb4); \u767b\u5f55\u540e\u590d\u5236 \u6b64\u8bed\u53e5\u5c06\u4f7f\u7528 utf8mb4 \u6821\u5bf9\u96c6\u5bf9 t1 \u548c t2 \u8868\u4e2d\u7684\u7528\u6237\u540d\u8fdb\u884c\u6bd4\u8f83\uff0c\u5e76\u5220\u9664\u7b26\u5408\u6761\u4ef6\u7684\u6240\u6709\u884c\u3002 \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u4f7f\u7528\u591a\u8868 DELETE [&hellip;]<\/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-6960","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6960","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=6960"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6960\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6960"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6960"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6960"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}