{"id":189324,"date":"2024-11-12T06:44:18","date_gmt":"2024-11-11T22:44:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189324\/"},"modified":"2024-11-12T06:44:19","modified_gmt":"2024-11-11T22:44:19","slug":"%e9%80%9a%e9%81%8e%e5%9f%b7%e8%a1%8c%e5%a4%9a%e6%a2%9dsql%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189324\/","title":{"rendered":"\u901a\u904e\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9"},"content":{"rendered":"<h1 id=\"%e9%80%9a%e9%81%8e%e5%9f%b7%e8%a1%8c%e5%a4%9a%e6%a2%9dsql%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99-EOKkHUnICP\">\u901a\u904e\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\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\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u901a\u904e\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\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-EOKkHUnICP\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u4e8b\u52d9\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u662f\u4e00\u500b\u908f\u8f2f\u4e0a\u7684\u64cd\u4f5c\u55ae\u5143\uff0c\u901a\u5e38\u7531\u591a\u689dSQL\u8a9e\u53e5\u7d44\u6210\u3002\u4e8b\u52d9\u7684\u4e3b\u8981\u7279\u6027\u5305\u62ec\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\u4e8b\u52d9\u7684\u57f7\u884c\u4e0d\u61c9\u53d7\u5230\u5176\u4ed6\u4e8b\u52d9\u7684\u5f71\u97ff\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u61c9\u6c38\u4e45\u4fdd\u5b58\u5728\u6578\u64da\u5eab\u4e2d\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%e4%ba%8b%e5%8b%99-EOKkHUnICP\">\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9<\/h2>\n<p>\u5728\u5927\u591a\u6578\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u7ba1\u7406\u4e8b\u52d9\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9\u7684\u4e00\u822c\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li>\u958b\u59cb\u4e8b\u52d9\u3002<\/li>\n<li>\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u3002<\/li>\n<li>\u6839\u64da\u57f7\u884c\u7d50\u679c\u6c7a\u5b9a\u63d0\u4ea4\u6216\u56de\u6efe\u4e8b\u52d9\u3002<\/li>\n<\/ol>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8mysql%e5%af%a6%e7%8f%be%e4%ba%8b%e5%8b%99-EOKkHUnICP\">\u793a\u4f8b\uff1a\u4f7f\u7528MySQL\u5be6\u73fe\u4e8b\u52d9<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528MySQL\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u901a\u904e\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u4e8b\u52d9\uff1a<\/p>\n<pre><code>START TRANSACTION;\n\nINSERT INTO accounts (user_id, balance) VALUES (1, 1000);\nUPDATE accounts SET balance = balance - 100 WHERE user_id = 2;\n\n-- \u6aa2\u67e5\u662f\u5426\u6709\u932f\u8aa4\nIF (ROW_COUNT() = 0) THEN\n    ROLLBACK;\nELSE\n    COMMIT;\nEND IF;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\uff0c\u7136\u5f8c\u63d2\u5165\u4e00\u689d\u8a18\u9304\u4e26\u66f4\u65b0\u53e6\u4e00\u689d\u8a18\u9304\u3002\u5982\u679c\u66f4\u65b0\u64cd\u4f5c\u6c92\u6709\u5f71\u97ff\u5230\u4efb\u4f55\u884c\uff0c\u5247\u56de\u6efe\u4e8b\u52d9\uff1b\u5426\u5247\uff0c\u63d0\u4ea4\u4e8b\u52d9\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8jdbc%e9%80%b2%e8%a1%8c%e4%ba%8b%e5%8b%99%e7%ae%a1%e7%90%86-EOKkHUnICP\">\u4f7f\u7528JDBC\u9032\u884c\u4e8b\u52d9\u7ba1\u7406<\/h3>\n<p>\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528JDBC\u4f86\u7ba1\u7406\u6578\u64da\u5eab\u4e8b\u52d9\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>Connection conn = null;\ntry {\n    conn = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/mydb\", \"user\", \"password\");\n    conn.setAutoCommit(false); \/\/ \u7981\u7528\u81ea\u52d5\u63d0\u4ea4\n\n    Statement stmt = conn.createStatement();\n    stmt.executeUpdate(\"INSERT INTO accounts (user_id, balance) VALUES (1, 1000)\");\n    stmt.executeUpdate(\"UPDATE accounts SET balance = balance - 100 WHERE user_id = 2\");\n\n    conn.commit(); \/\/ \u63d0\u4ea4\u4e8b\u52d9\n} catch (SQLException e) {\n    if (conn != null) {\n        conn.rollback(); \/\/ \u56de\u6efe\u4e8b\u52d9\n    }\n    e.printStackTrace();\n} finally {\n    if (conn != null) {\n        conn.close(); \/\/ \u95dc\u9589\u9023\u63a5\n    }\n}<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u7981\u7528\u81ea\u52d5\u63d0\u4ea4\uff0c\u7136\u5f8c\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u3002\u5982\u679c\u51fa\u73fe\u7570\u5e38\uff0c\u5247\u56de\u6efe\u4e8b\u52d9\uff0c\u5426\u5247\u63d0\u4ea4\u4e8b\u52d9\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-EOKkHUnICP\">\u7d50\u8ad6<\/h2>\n<p>\u901a\u904e\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9\u662f\u4e00\u500b\u91cd\u8981\u7684\u6280\u8853\uff0c\u80fd\u5920\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u7121\u8ad6\u662f\u5728MySQL\u9084\u662f\u4f7f\u7528JDBC\u9032\u884cJava\u958b\u767c\uff0c\u7406\u89e3\u4e8b\u52d9\u7684\u7ba1\u7406\u90fd\u662f\u958b\u767c\u8005\u5fc5\u5099\u7684\u6280\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u6578\u64da\u5b89\u5168\u6027\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u6b63\u78ba\u5730\u4f7f\u7528\u6578\u64da\u5eab\u4e8b\u52d9\u5c07\u5927\u5927\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u901a\u904e\u57f7\u884c\u591a\u689dSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u4e8b\u52d9\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\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-189324","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189324","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=189324"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189324\/revisions"}],"predecessor-version":[{"id":189325,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189324\/revisions\/189325"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=189324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=189324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=189324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}