{"id":187198,"date":"2024-11-11T12:16:22","date_gmt":"2024-11-11T04:16:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187198\/"},"modified":"2024-11-11T12:16:23","modified_gmt":"2024-11-11T04:16:23","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e5%ad%98%e5%9c%a8%e5%97%8e%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-%e4%ba%8b%e5%8b%99-%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187198\/","title":{"rendered":"\u6578\u64da\u5eab\u4e8b\u52d9\u5b58\u5728\u55ce\uff1f (\u6578\u64da\u5eab \u4e8b\u52d9 \u662f\u5426\u5b58\u5728)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e5%ad%98%e5%9c%a8%e5%97%8e%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab-%e4%ba%8b%e5%8b%99-%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8-pUelkPvDLv\">\u6578\u64da\u5eab\u4e8b\u52d9\u5b58\u5728\u55ce\uff1f (\u6578\u64da\u5eab \u4e8b\u52d9 \u662f\u5426\u5b58\u5728)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u6578\u64da\u5eab\u4e8b\u52d9\uff08Transaction\uff09\u662f\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u7684\u4e00\u500b\u6838\u5fc3\u6982\u5ff5\uff0c\u5c0d\u65bc\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u5b9a\u7fa9\u3001\u7279\u6027\u4ee5\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%ef%bc%9f-pUelkPvDLv\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u4e8b\u52d9\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\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\u3002\u9019\u7a2e\u7279\u6027\u88ab\u7a31\u70ba\u539f\u5b50\u6027\uff08Atomicity\uff09\u3002\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u4e8b\u52d9\u901a\u5e38\u6d89\u53ca\u5230\u5c0d\u6578\u64da\u7684\u8b80\u53d6\u548c\u5beb\u5165\u64cd\u4f5c\uff0c\u4e26\u4e14\u9019\u4e9b\u64cd\u4f5c\u5fc5\u9808\u5728\u4e00\u500b\u908f\u8f2f\u55ae\u5143\u5167\u5b8c\u6210\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e7%9a%84acid%e7%89%b9%e6%80%a7-pUelkPvDLv\">\u6578\u64da\u5eab\u4e8b\u52d9\u7684ACID\u7279\u6027<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u7ba1\u7406\u9075\u5faa\u56db\u500b\u57fa\u672c\u7279\u6027\uff0c\u901a\u5e38\u88ab\u7a31\u70baACID\u7279\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09<\/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\uff08Consistency\uff09<\/strong>\uff1a\u4e8b\u52d9\u7684\u57f7\u884c\u5fc5\u9808\u4f7f\u6578\u64da\u5eab\u5f9e\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027\uff08Isolation\uff09<\/strong>\uff1a\u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e4b\u9593\u4e0d\u61c9\u8a72\u4e92\u76f8\u5e72\u64fe\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u61c9\u8a72\u662f\u6c38\u4e45\u6027\u7684\uff0c\u5373\u4f7f\u7cfb\u7d71\u5d29\u6f70\u4e5f\u4e0d\u6703\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-pUelkPvDLv\">\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u4f7f\u7528\u5834\u666f\u975e\u5e38\u5ee3\u6cdb\u3002\u4f8b\u5982\uff0c\u5728\u9280\u884c\u7cfb\u7d71\u4e2d\uff0c\u8f49\u8cec\u64cd\u4f5c\u6d89\u53ca\u5230\u5f9e\u4e00\u500b\u8cec\u6236\u6263\u6b3e\u548c\u5411\u53e6\u4e00\u500b\u8cec\u6236\u5b58\u6b3e\u3002\u9019\u5169\u500b\u64cd\u4f5c\u5fc5\u9808\u4f5c\u70ba\u4e00\u500b\u4e8b\u52d9\u4f86\u57f7\u884c\uff0c\u4ee5\u78ba\u4fdd\u4e0d\u6703\u51fa\u73fe\u8cc7\u91d1\u4e1f\u5931\u7684\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684SQL\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN TRANSACTION;\n\nUPDATE accounts SET balance = balance - 100 WHERE account_id = 1;\nUPDATE accounts SET balance = balance + 100 WHERE account_id = 2;\n\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u53ea\u6709\u7576\u5169\u500b\u66f4\u65b0\u64cd\u4f5c\u90fd\u6210\u529f\u6642\uff0c\u4e8b\u52d9\u624d\u6703\u63d0\u4ea4\u3002\u5982\u679c\u5176\u4e2d\u4e00\u500b\u64cd\u4f5c\u5931\u6557\uff0c\u5247\u6574\u500b\u4e8b\u52d9\u5c07\u88ab\u56de\u6efe\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5-pUelkPvDLv\">\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225<\/h2>\n<p>\u70ba\u4e86\u5be6\u73fe\u4e8b\u52d9\u7684\u9694\u96e2\u6027\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u9694\u96e2\u7d1a\u5225\u3002\u9019\u4e9b\u9694\u96e2\u7d1a\u5225\u6c7a\u5b9a\u4e86\u4e8b\u52d9\u4e4b\u9593\u7684\u53ef\u898b\u6027\u548c\u5e72\u64fe\u7a0b\u5ea6\u3002\u5e38\u898b\u7684\u9694\u96e2\u7d1a\u5225\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u672a\u63d0\u4ea4\uff08Read Uncommitted\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ef\u4ee5\u8b80\u53d6\u5176\u4ed6\u4e8b\u52d9\u672a\u63d0\u4ea4\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/strong>\uff1a\u4e8b\u52d9\u53ea\u80fd\u8b80\u53d6\u5df2\u63d0\u4ea4\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/strong>\uff1a\u5728\u540c\u4e00\u4e8b\u52d9\u4e2d\u591a\u6b21\u8b80\u53d6\u540c\u4e00\u6578\u64da\u6642\uff0c\u7d50\u679c\u662f\u4e00\u81f4\u7684\u3002<\/li>\n<li><strong>\u5e8f\u5217\u5316\uff08Serializable\uff09<\/strong>\uff1a\u6700\u9ad8\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u4e8b\u52d9\u5b8c\u5168\u9694\u96e2\uff0c\u50cf\u662f\u4e32\u884c\u57f7\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-pUelkPvDLv\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u5b58\u5728\u5c0d\u65bc\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u9075\u5faaACID\u7279\u6027\uff0c\u6578\u64da\u5eab\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u591a\u500b\u4e8b\u52d9\u7684\u57f7\u884c\uff0c\u4e26\u78ba\u4fdd\u5728\u9762\u5c0d\u932f\u8aa4\u6216\u7cfb\u7d71\u6545\u969c\u6642\uff0c\u6578\u64da\u4e0d\u6703\u53d7\u5230\u640d\u5bb3\u3002\u96a8\u8457\u6578\u64da\u5eab\u6280\u8853\u7684\u767c\u5c55\uff0c\u4e8b\u52d9\u7684\u7ba1\u7406\u548c\u512a\u5316\u4e5f\u5c07\u6210\u70ba\u672a\u4f86\u7814\u7a76\u7684\u91cd\u8981\u65b9\u5411\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u4e8b\u52d9\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\uff0c\u9069\u5408\u5404\u7a2e\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u8a0e\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u5b58\u5728\u6027\uff0c\u4e86\u89e3\u5176\u5728\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u4e2d\u7684\u91cd\u8981\u6027\u53ca\u5be6\u969b\u61c9\u7528\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-187198","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187198","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=187198"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187198\/revisions"}],"predecessor-version":[{"id":187199,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187198\/revisions\/187199"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}