{"id":7574,"date":"2024-11-14T09:08:00","date_gmt":"2024-11-14T01:08:00","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7574\/"},"modified":"2024-11-14T09:08:00","modified_gmt":"2024-11-14T01:08:00","slug":"mysql-update-%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b8%8e%e6%ad%bb%e9%94%81%e9%a3%8e%e9%99%a9%ef%bc%9a%e5%a6%82%e4%bd%95%e5%b9%b3%e8%a1%a1%e6%95%88%e7%8e%87%e4%b8%8e%e5%ae%89%e5%85%a8%e6%80%a7","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7574\/","title":{"rendered":"MySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669\uff1a\u5982\u4f55\u5e73\u8861\u6548\u7387\u4e0e\u5b89\u5168\u6027\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173102941111545.jpg\" class=\"aligncenter\" title=\"MySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669\uff1a\u5982\u4f55\u5e73\u8861\u6548\u7387\u4e0e\u5b89\u5168\u6027\uff1f\u63d2\u56fe\" alt=\"MySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669\uff1a\u5982\u4f55\u5e73\u8861\u6548\u7387\u4e0e\u5b89\u5168\u6027\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669<\/strong><\/p>\n<p>MySQL UPDATE \u64cd\u4f5c\u5728\u5e95\u5c42\u5b9e\u73b0\u4e0a\u4f7f\u7528\u4e0e INSERT \u548c DELETE \u76f8\u540c\u7684\u5b58\u50a8\u5f15\u64ce API\u3002\u5f53\u6267\u884c UPDATE \u64cd\u4f5c\u65f6\uff0cMySQL \u4f1a\u5148\u8bfb\u53d6\u53d7\u5f71\u54cd\u7684\u884c\uff0c\u7136\u540e\u6839\u636e\u6307\u5b9a\u7684\u53d8\u66f4\u5e94\u7528\u66f4\u65b0\u3002<\/p>\n<p>\u5728\u5927\u91cf\u884c\u66f4\u65b0\u573a\u666f\u4e2d\uff0c\u6027\u80fd\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u4e3b\u8981\u539f\u56e0\u662f\uff1a<\/p>\n<ul>\n<li> <strong>\u9501\u7ade\u4e89\uff1a<\/strong>UPDATE \u64cd\u4f5c\u4f1a\u5bf9\u53d7\u5f71\u54cd\u7684\u884c\u52a0\u9501\uff0c\u5982\u679c\u540c\u65f6\u6709\u5176\u4ed6\u64cd\u4f5c\u5c1d\u8bd5\u8bbf\u95ee\u8fd9\u4e9b\u884c\uff0c\u5219\u53ef\u80fd\u5bfc\u81f4\u9501\u7ade\u4e89\u3002<\/li>\n<li> <strong>\u6570\u636e\u8bfb\u53d6\uff1a<\/strong>\u4e3a\u4e86\u66f4\u65b0\u884c\uff0cMySQL \u9700\u8981\u8bfb\u53d6\u539f\u59cb\u6570\u636e\uff0c\u8fd9\u53ef\u80fd\u4f1a\u6d88\u8017\u5927\u91cf\u7684 I\/O \u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u6d77\u91cf\u6570\u636e\u66f4\u65b0\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4f18\u5316\u7b56\u7565\uff1a<\/p>\n<ul>\n<li> <strong>\u6279\u5904\u7406\uff1a<\/strong>\u5c06\u591a\u4e2a UPDATE \u64cd\u4f5c\u7ec4\u5408\u6210\u4e00\u4e2a\u6279\u5904\u7406\uff0c\u4ee5\u51cf\u5c11\u9501\u7ade\u4e89\u548c I\/O \u5f00\u9500\u3002<\/li>\n<li> <strong>\u7d22\u5f15\u4f7f\u7528\uff1a<\/strong>\u5728\u66f4\u65b0\u6761\u4ef6\u4e2d\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<li> <strong>\u4e8b\u52a1\u4f18\u5316\uff1a<\/strong>\u5728\u4e8b\u52a1\u4e2d\u6267\u884c\u5927\u91cf\u66f4\u65b0\u65f6\uff0c\u91c7\u7528\u4e50\u89c2\u9501\u673a\u5236\u6216\u4f7f\u7528\u9501\u8868\u64cd\u4f5c\u53ef\u4ee5\u964d\u4f4e\u6b7b\u9501\u98ce\u9669\u3002<\/li>\n<\/ul>\n<p>\u5728\u4e8b\u52a1\u4e2d\u66f4\u65b0\u5927\u6279\u91cf\u6570\u636e\u65f6\uff0c\u6b7b\u9501\u98ce\u9669\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li> <strong>\u9694\u79bb\u7ea7\u522b\uff1a<\/strong>REPEATED READ \u6216 SERIALIZABLE \u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u6b7b\u9501\u66f4\u6709\u53ef\u80fd\u53d1\u751f\u3002<\/li>\n<li> <strong>\u9501\u7b56\u7565\uff1a<\/strong>\u60b2\u89c2\u9501\u6216\u4e50\u89c2\u9501\u7b56\u7565\u4e5f\u4f1a\u5f71\u54cd\u6b7b\u9501\u98ce\u9669\u3002<\/li>\n<li> <strong>\u5e76\u53d1\u7a0b\u5ea6\uff1a<\/strong>\u4e8b\u52a1\u5e76\u53d1\u6267\u884c\u7684\u6570\u91cf\u4e5f\u4f1a\u589e\u52a0\u6b7b\u9501\u7684\u53ef\u80fd\u6027\u3002<\/li>\n<\/ul>\n<p>\u4e3a\u4e86\u51cf\u5c11\u6b7b\u9501\u98ce\u9669\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n<ul>\n<li> <strong>\u964d\u4f4e\u9694\u79bb\u7ea7\u522b\uff1a<\/strong>\u4f7f\u7528 READ COMMITTED \u6216 READ UNCOMMITTED \u9694\u79bb\u7ea7\u522b\u53ef\u4ee5\u51cf\u5c11\u9501\u7ade\u4e89\u3002<\/li>\n<li> <strong>\u91c7\u7528\u4e50\u89c2\u9501\uff1a<\/strong>\u4f7f\u7528 SELECT .. FOR UPDATE \u67e5\u8be2\u9501\u4f4f\u53d7\u5f71\u54cd\u7684\u884c\uff0c\u7136\u540e\u7acb\u5373\u66f4\u65b0\uff0c\u53ef\u4ee5\u907f\u514d\u884c\u7ea7\u522b\u7684\u9501\u7ade\u4e89\u3002<\/li>\n<li> <strong>\u4f7f\u7528\u9501\u8868\uff1a<\/strong>\u5728\u6267\u884c\u6279\u91cf\u66f4\u65b0\u4e4b\u524d\uff0c\u9501\u5b9a\u76ee\u6807\u8868\u53ef\u4ee5\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u8bbf\u95ee\u8be5\u8868\uff0c\u4ece\u800c\u6d88\u9664\u6b7b\u9501\u98ce\u9669\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fMySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669\uff1a\u5982\u4f55\u5e73\u8861\u6548\u7387\u4e0e\u5b89\u5168\u6027\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>MySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669 MySQL UPDATE \u64cd\u4f5c\u5728\u5e95\u5c42\u5b9e\u73b0\u4e0a\u4f7f\u7528\u4e0e INSERT \u548c DELETE \u76f8\u540c\u7684\u5b58\u50a8\u5f15\u64ce API\u3002\u5f53\u6267\u884c UPDATE \u64cd\u4f5c\u65f6\uff0cMySQL \u4f1a\u5148\u8bfb\u53d6\u53d7\u5f71\u54cd\u7684\u884c\uff0c\u7136\u540e\u6839\u636e\u6307\u5b9a\u7684\u53d8\u66f4\u5e94\u7528\u66f4\u65b0\u3002 \u5728\u5927\u91cf\u884c\u66f4\u65b0\u573a\u666f\u4e2d\uff0c\u6027\u80fd\u4f1a\u53d7\u5230\u5f71\u54cd\uff0c\u4e3b\u8981\u539f\u56e0\u662f\uff1a \u9501\u7ade\u4e89\uff1aUPDATE \u64cd\u4f5c\u4f1a\u5bf9\u53d7\u5f71\u54cd\u7684\u884c\u52a0\u9501\uff0c\u5982\u679c\u540c\u65f6\u6709\u5176\u4ed6\u64cd\u4f5c\u5c1d\u8bd5\u8bbf\u95ee\u8fd9\u4e9b\u884c\uff0c\u5219\u53ef\u80fd\u5bfc\u81f4\u9501\u7ade\u4e89\u3002 \u6570\u636e\u8bfb\u53d6\uff1a\u4e3a\u4e86\u66f4\u65b0\u884c\uff0cMySQL \u9700\u8981\u8bfb\u53d6\u539f\u59cb\u6570\u636e\uff0c\u8fd9\u53ef\u80fd\u4f1a\u6d88\u8017\u5927\u91cf\u7684 I\/O \u64cd\u4f5c\u3002 \u5bf9\u4e8e\u6d77\u91cf\u6570\u636e\u66f4\u65b0\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4f18\u5316\u7b56\u7565\uff1a \u6279\u5904\u7406\uff1a\u5c06\u591a\u4e2a UPDATE \u64cd\u4f5c\u7ec4\u5408\u6210\u4e00\u4e2a\u6279\u5904\u7406\uff0c\u4ee5\u51cf\u5c11\u9501\u7ade\u4e89\u548c I\/O \u5f00\u9500\u3002 \u7d22\u5f15\u4f7f\u7528\uff1a\u5728\u66f4\u65b0\u6761\u4ef6\u4e2d\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002 \u4e8b\u52a1\u4f18\u5316\uff1a\u5728\u4e8b\u52a1\u4e2d\u6267\u884c\u5927\u91cf\u66f4\u65b0\u65f6\uff0c\u91c7\u7528\u4e50\u89c2\u9501\u673a\u5236\u6216\u4f7f\u7528\u9501\u8868\u64cd\u4f5c\u53ef\u4ee5\u964d\u4f4e\u6b7b\u9501\u98ce\u9669\u3002 \u5728\u4e8b\u52a1\u4e2d\u66f4\u65b0\u5927\u6279\u91cf\u6570\u636e\u65f6\uff0c\u6b7b\u9501\u98ce\u9669\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a \u9694\u79bb\u7ea7\u522b\uff1aREPEATED READ \u6216 SERIALIZABLE \u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u6b7b\u9501\u66f4\u6709\u53ef\u80fd\u53d1\u751f\u3002 \u9501\u7b56\u7565\uff1a\u60b2\u89c2\u9501\u6216\u4e50\u89c2\u9501\u7b56\u7565\u4e5f\u4f1a\u5f71\u54cd\u6b7b\u9501\u98ce\u9669\u3002 \u5e76\u53d1\u7a0b\u5ea6\uff1a\u4e8b\u52a1\u5e76\u53d1\u6267\u884c\u7684\u6570\u91cf\u4e5f\u4f1a\u589e\u52a0\u6b7b\u9501\u7684\u53ef\u80fd\u6027\u3002 \u4e3a\u4e86\u51cf\u5c11\u6b7b\u9501\u98ce\u9669\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a \u964d\u4f4e\u9694\u79bb\u7ea7\u522b\uff1a\u4f7f\u7528 READ COMMITTED \u6216 READ UNCOMMITTED \u9694\u79bb\u7ea7\u522b\u53ef\u4ee5\u51cf\u5c11\u9501\u7ade\u4e89\u3002 \u91c7\u7528\u4e50\u89c2\u9501\uff1a\u4f7f\u7528 SELECT .. FOR UPDATE \u67e5\u8be2\u9501\u4f4f\u53d7\u5f71\u54cd\u7684\u884c\uff0c\u7136\u540e\u7acb\u5373\u66f4\u65b0\uff0c\u53ef\u4ee5\u907f\u514d\u884c\u7ea7\u522b\u7684\u9501\u7ade\u4e89\u3002 \u4f7f\u7528\u9501\u8868\uff1a\u5728\u6267\u884c\u6279\u91cf\u66f4\u65b0\u4e4b\u524d\uff0c\u9501\u5b9a\u76ee\u6807\u8868\u53ef\u4ee5\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u8bbf\u95ee\u8be5\u8868\uff0c\u4ece\u800c\u6d88\u9664\u6b7b\u9501\u98ce\u9669\u3002 \u4ee5\u4e0a\u5c31\u662fMySQL UPDATE \u6027\u80fd\u4f18\u5316\u4e0e\u6b7b\u9501\u98ce\u9669\uff1a\u5982\u4f55\u5e73\u8861\u6548\u7387\u4e0e\u5b89\u5168\u6027\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},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7574","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7574","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=7574"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7574\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7574"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}