{"id":143911,"date":"2024-11-01T02:17:17","date_gmt":"2024-10-31T18:17:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143911\/"},"modified":"2024-11-01T02:17:18","modified_gmt":"2024-10-31T18:17:18","slug":"sql-%e4%ba%8b%e5%8b%99%e7%9a%84%e6%93%8d%e4%bd%9c%e8%aa%9e%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143911\/","title":{"rendered":"SQL \u4e8b\u52d9\u7684\u64cd\u4f5c\u8a9e\u6cd5"},"content":{"rendered":"<h1 id=\"sql-%e4%ba%8b%e5%8b%99%e7%9a%84%e6%93%8d%e4%bd%9c%e8%aa%9e%e6%b3%95-fghyBUaAWo\">SQL \u4e8b\u52d9\u7684\u64cd\u4f5c\u8a9e\u6cd5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u8cc7\u6599\u7684\u6a19\u6e96\u8a9e\u8a00\u3002SQL \u4e8b\u52d9\u662f\u6307\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\u78ba\u4fdd\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQL \u4e8b\u52d9\u7684\u64cd\u4f5c\u8a9e\u6cd5\u53ca\u5176\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-sql-%e4%ba%8b%e5%8b%99%ef%bc%9f-fghyBUaAWo\">\u4ec0\u9ebc\u662f SQL \u4e8b\u52d9\uff1f<\/h2>\n<p>SQL \u4e8b\u52d9\u662f\u4e00\u500b\u908f\u8f2f\u4e0a\u7684\u64cd\u4f5c\u55ae\u4f4d\uff0c\u901a\u5e38\u7531\u591a\u500b SQL \u8a9e\u53e5\u7d44\u6210\u3002\u4e8b\u52d9\u7684\u4e3b\u8981\u7279\u6027\u5305\u62ec\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u548c\u6301\u4e45\u6027\uff0c\u9019\u56db\u500b\u7279\u6027\u901a\u5e38\u88ab\u7a31\u70ba ACID \u539f\u5247\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\u8cc7\u6599\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\u4e0d\u61c9\u4e92\u76f8\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\u8cc7\u6599\u5eab\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"sql-%e4%ba%8b%e5%8b%99%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%93%8d%e4%bd%9c%e8%aa%9e%e6%b3%95-fghyBUaAWo\">SQL \u4e8b\u52d9\u7684\u57fa\u672c\u64cd\u4f5c\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u4e8b\u52d9\u7684\u64cd\u4f5c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u8a9e\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e9%96%8b%e5%a7%8b%e4%ba%8b%e5%8b%99-fghyBUaAWo\">1. \u958b\u59cb\u4e8b\u52d9<\/h3>\n<pre><code>BEGIN TRANSACTION;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u7528\u65bc\u958b\u59cb\u4e00\u500b\u65b0\u7684\u4e8b\u52d9\u3002\u5728\u9019\u500b\u4e8b\u52d9\u4e2d\uff0c\u6240\u6709\u5f8c\u7e8c\u7684 SQL \u64cd\u4f5c\u90fd\u5c07\u88ab\u8996\u70ba\u4e00\u500b\u6574\u9ad4\u3002<\/p>\n<h3 id=\"2-%e6%8f%90%e4%ba%a4%e4%ba%8b%e5%8b%99-fghyBUaAWo\">2. \u63d0\u4ea4\u4e8b\u52d9<\/h3>\n<pre><code>COMMIT;<\/code><\/pre>\n<p>\u7576\u6240\u6709\u64cd\u4f5c\u6210\u529f\u57f7\u884c\u5f8c\uff0c\u4f7f\u7528\u9019\u689d\u8a9e\u53e5\u4f86\u63d0\u4ea4\u4e8b\u52d9\uff0c\u5c07\u6240\u6709\u8b8a\u66f4\u6c38\u4e45\u4fdd\u5b58\u5230\u8cc7\u6599\u5eab\u4e2d\u3002<\/p>\n<h3 id=\"3-%e5%9b%9e%e6%bb%be%e4%ba%8b%e5%8b%99-fghyBUaAWo\">3. \u56de\u6efe\u4e8b\u52d9<\/h3>\n<pre><code>ROLLBACK;<\/code><\/pre>\n<p>\u5982\u679c\u5728\u4e8b\u52d9\u57f7\u884c\u904e\u7a0b\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528\u9019\u689d\u8a9e\u53e5\u4f86\u64a4\u92b7\u6240\u6709\u5df2\u57f7\u884c\u7684\u64cd\u4f5c\uff0c\u5c07\u8cc7\u6599\u5eab\u6062\u5fa9\u5230\u4e8b\u52d9\u958b\u59cb\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-fghyBUaAWo\">\u4e8b\u52d9\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 SQL \u4e8b\u52d9\u4f86\u8655\u7406\u9280\u884c\u8f49\u5e33\u64cd\u4f5c\uff1a<\/p>\n<pre><code>\nBEGIN TRANSACTION;\n\nUPDATE accounts SET balance = balance - 100 WHERE account_id = 1;\nUPDATE accounts SET balance = balance + 100 WHERE account_id = 2;\n\nIF @@ERROR  0\nBEGIN\n    ROLLBACK;\n    PRINT '\u8f49\u5e33\u5931\u6557';\nEND\nELSE\nBEGIN\n    COMMIT;\n    PRINT '\u8f49\u5e33\u6210\u529f';\nEND\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u9996\u5148\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\uff0c\u7136\u5f8c\u57f7\u884c\u5169\u500b\u66f4\u65b0\u64cd\u4f5c\u3002\u5982\u679c\u5176\u4e2d\u4e00\u500b\u64cd\u4f5c\u5931\u6557\uff0c\u5247\u56de\u6efe\u4e8b\u52d9\uff1b\u5982\u679c\u5169\u500b\u64cd\u4f5c\u90fd\u6210\u529f\uff0c\u5247\u63d0\u4ea4\u4e8b\u52d9\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-fghyBUaAWo\">\u7d50\u8ad6<\/h2>\n<p>SQL \u4e8b\u52d9\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u78ba\u4fdd\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u4f7f\u7528\u6b63\u78ba\u7684\u64cd\u4f5c\u8a9e\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6599\u5eab\u4e2d\u7684\u8cc7\u6599\u8b8a\u66f4\uff0c\u4e26\u5728\u51fa\u73fe\u932f\u8aa4\u6642\u9032\u884c\u9069\u7576\u7684\u8655\u7406\u3002\u4e86\u89e3\u548c\u638c\u63e1 SQL \u4e8b\u52d9\u7684\u64cd\u4f5c\u8a9e\u6cd5\uff0c\u5c0d\u65bc\u4efb\u4f55\u5f9e\u4e8b\u8cc7\u6599\u5eab\u958b\u767c\u548c\u7ba1\u7406\u7684\u4eba\u54e1\u4f86\u8aaa\u90fd\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u6280\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u8cc7\u6599\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1SQL\u4e8b\u52d9\u64cd\u4f5c\u8a9e\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u8cc7\u6599\u5eab\u4e8b\u52d9\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\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-143911","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143911","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=143911"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143911\/revisions"}],"predecessor-version":[{"id":143912,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143911\/revisions\/143912"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}