{"id":175119,"date":"2024-11-08T02:53:35","date_gmt":"2024-11-07T18:53:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175119\/"},"modified":"2024-11-08T02:53:36","modified_gmt":"2024-11-07T18:53:36","slug":"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab-update-%e5%9b%9e%e6%bb%be%e6%a9%9f%e5%88%b6%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-update-%e5%9b%9e%e6%bb%be","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175119\/","title":{"rendered":"\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab update \u56de\u6efe\u6a5f\u5236\uff1f (\u6578\u64da\u5eab update \u56de\u6efe)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab-update-%e5%9b%9e%e6%bb%be%e6%a9%9f%e5%88%b6%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-update-%e5%9b%9e%e6%bb%be-gqHfmTPRAW\">\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab update \u56de\u6efe\u6a5f\u5236\uff1f (\u6578\u64da\u5eab update \u56de\u6efe)<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7576\u9032\u884c\u6578\u64da\u66f4\u65b0\u6642\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u932f\u8aa4\u6216\u610f\u5916\u60c5\u6cc1\uff0c\u9019\u6642\u5019\u56de\u6efe\u6a5f\u5236\u5c31\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u7684 update \u56de\u6efe\u6a5f\u5236\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u9762\u5c0d\u6578\u64da\u66f4\u65b0\u5931\u6557\u6642\uff0c\u80fd\u5920\u6709\u6548\u5730\u6062\u5fa9\u5230\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%9b%9e%e6%bb%be%e6%a9%9f%e5%88%b6%ef%bc%9f-gqHfmTPRAW\">\u4ec0\u9ebc\u662f\u56de\u6efe\u6a5f\u5236\uff1f<\/h2>\n<p>\u56de\u6efe\u6a5f\u5236\u662f\u6307\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\uff0c\u7576\u67d0\u500b\u64cd\u4f5c\u5931\u6557\u6216\u51fa\u73fe\u932f\u8aa4\u6642\uff0c\u80fd\u5920\u5c07\u6578\u64da\u6062\u5fa9\u5230\u64cd\u4f5c\u4e4b\u524d\u7684\u72c0\u614b\u3002\u9019\u4e00\u6a5f\u5236\u901a\u5e38\u4f9d\u8cf4\u65bc\u6578\u64da\u5eab\u7684\u4e8b\u52d9\u7ba1\u7406\u529f\u80fd\u3002\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-gqHfmTPRAW\">\u4e8b\u52d9\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u4e8b\u52d9\u5177\u6709\u4ee5\u4e0b\u56db\u500b\u7279\u6027\uff0c\u901a\u5e38\u7a31\u70baACID\u7279\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027 (Atomicity)<\/strong>\uff1a\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u57f7\u884c\uff0c\u8981\u9ebc\u5168\u90e8\u4e0d\u57f7\u884c\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027 (Consistency)<\/strong>\uff1a\u4e8b\u52d9\u57f7\u884c\u524d\u5f8c\uff0c\u6578\u64da\u5eab\u7684\u72c0\u614b\u5fc5\u9808\u4fdd\u6301\u4e00\u81f4\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027 (Isolation)<\/strong>\uff1a\u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e0d\u61c9\u4e92\u76f8\u5e72\u64fe\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027 (Durability)<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5c0d\u6578\u64da\u7684\u4fee\u6539\u5c07\u6c38\u4e45\u4fdd\u5b58\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9b%9e%e6%bb%be%e6%a9%9f%e5%88%b6-gqHfmTPRAW\">\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u7684\u56de\u6efe\u6a5f\u5236<\/h2>\n<p>\u5be6\u73fe\u6578\u64da\u5eab\u7684\u56de\u6efe\u6a5f\u5236\u901a\u5e38\u9700\u8981\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e9%96%8b%e5%a7%8b%e4%ba%8b%e5%8b%99-gqHfmTPRAW\">1. \u958b\u59cb\u4e8b\u52d9<\/h3>\n<pre><code>BEGIN TRANSACTION;<\/code><\/pre>\n<p>\u5728\u9032\u884c\u4efb\u4f55\u6578\u64da\u66f4\u65b0\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6240\u6709\u5f8c\u7e8c\u7684\u64cd\u4f5c\u90fd\u5728\u9019\u500b\u4e8b\u52d9\u7684\u7bc4\u570d\u5167\u3002<\/p>\n<h3 id=\"2-%e5%9f%b7%e8%a1%8c%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0-gqHfmTPRAW\">2. \u57f7\u884c\u6578\u64da\u66f4\u65b0<\/h3>\n<pre><code>UPDATE users SET email = 'newemail@example.com' WHERE id = 1;<\/code><\/pre>\n<p>\u5728\u4e8b\u52d9\u4e2d\u57f7\u884c\u6578\u64da\u66f4\u65b0\u64cd\u4f5c\u3002\u5982\u679c\u9019\u500b\u64cd\u4f5c\u6210\u529f\uff0c\u5247\u53ef\u4ee5\u7e7c\u7e8c\u9032\u884c\u4e0b\u4e00\u6b65\uff1b\u5982\u679c\u5931\u6557\uff0c\u5247\u9700\u8981\u56de\u6efe\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%93%8d%e4%bd%9c%e7%b5%90%e6%9e%9c-gqHfmTPRAW\">3. \u6aa2\u67e5\u64cd\u4f5c\u7d50\u679c<\/h3>\n<p>\u5728\u57f7\u884c\u66f4\u65b0\u5f8c\uff0c\u61c9\u8a72\u6aa2\u67e5\u64cd\u4f5c\u662f\u5426\u6210\u529f\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u8fd4\u56de\u7684\u72c0\u614b\u78bc\u6216\u6355\u7372\u7570\u5e38\u4f86\u5be6\u73fe\u3002<\/p>\n<h3 id=\"4-%e6%8f%90%e4%ba%a4%e6%88%96%e5%9b%9e%e6%bb%be%e4%ba%8b%e5%8b%99-gqHfmTPRAW\">4. \u63d0\u4ea4\u6216\u56de\u6efe\u4e8b\u52d9<\/h3>\n<pre><code>COMMIT;<\/code><\/pre>\n<p>\u5982\u679c\u6240\u6709\u64cd\u4f5c\u90fd\u6210\u529f\uff0c\u5247\u63d0\u4ea4\u4e8b\u52d9\uff0c\u5c07\u66f4\u6539\u6c38\u4e45\u4fdd\u5b58\u5230\u6578\u64da\u5eab\u4e2d\u3002\u5982\u679c\u51fa\u73fe\u932f\u8aa4\uff0c\u5247\u57f7\u884c\u56de\u6efe\u64cd\u4f5c\uff1a<\/p>\n<pre><code>ROLLBACK;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5c07\u6578\u64da\u6062\u5fa9\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-gqHfmTPRAW\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728MySQL\u4e2d\u5be6\u73fe\u56de\u6efe\u6a5f\u5236\uff1a<\/p>\n<pre><code>\nSTART TRANSACTION;\n\nUPDATE users SET email = 'newemail@example.com' WHERE id = 1;\n\nIF (ERROR) THEN\n    ROLLBACK;\nELSE\n    COMMIT;\nEND IF;\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-gqHfmTPRAW\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u7684 update \u56de\u6efe\u6a5f\u5236\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u53ef\u9760\u6027\u7684\u91cd\u8981\u624b\u6bb5\u3002\u901a\u904e\u4f7f\u7528\u4e8b\u52d9\u7ba1\u7406\u529f\u80fd\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u66f4\u65b0\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\uff0c\u4e26\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u7121\u8ad6\u662f\u5728\u958b\u767c\u9084\u662f\u751f\u7522\u74b0\u5883\u4e2d\uff0c\u7406\u89e3\u548c\u5be6\u73fe\u9019\u4e00\u6a5f\u5236\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u7684\u66f4\u65b0\u56de\u6efe\u6a5f\u5236\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\u6027\uff0c\u907f\u514d\u610f\u5916\u932f\u8aa4\u5f71\u97ff\u6578\u64da\u5b8c\u6574\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-175119","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175119","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=175119"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175119\/revisions"}],"predecessor-version":[{"id":175120,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175119\/revisions\/175120"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}