{"id":171341,"date":"2024-11-07T01:56:19","date_gmt":"2024-11-06T17:56:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171341\/"},"modified":"2024-11-07T01:56:20","modified_gmt":"2024-11-06T17:56:20","slug":"%e6%b7%ba%e8%ab%87oracle%e8%a1%8c%e7%b4%9a%e9%8e%96%e7%9a%84%e7%89%b9%e6%ae%8a%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171341\/","title":{"rendered":"\u6dfa\u8ac7Oracle\u884c\u7d1a\u9396\u7684\u7279\u6b8a\u7528\u6cd5"},"content":{"rendered":"<h1 id=\"%e6%b7%ba%e8%ab%87oracle%e8%a1%8c%e7%b4%9a%e9%8e%96%e7%9a%84%e7%89%b9%e6%ae%8a%e7%94%a8%e6%b3%95-fjNrQEJfAV\">\u6dfa\u8ac7Oracle\u884c\u7d1a\u9396\u7684\u7279\u6b8a\u7528\u6cd5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u624b\u6bb5\u3002Oracle\u8cc7\u6599\u5eab\u4f5c\u70ba\u4e00\u500b\u6210\u719f\u7684\u5546\u696d\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u7684\u6a5f\u5236\uff0c\u5176\u4e2d\u884c\u7d1a\u9396\uff08Row-Level Locking\uff09\u662f\u4e00\u500b\u7279\u5225\u91cd\u8981\u7684\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u884c\u7d1a\u9396\u7684\u7279\u6b8a\u7528\u6cd5\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u610f\u7fa9\u3002<\/p>\n<h2 id=\"%e8%a1%8c%e7%b4%9a%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-fjNrQEJfAV\">\u884c\u7d1a\u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u884c\u7d1a\u9396\u662f\u6307\u5728\u8cc7\u6599\u5eab\u4e2d\u5c0d\u7279\u5b9a\u884c\u9032\u884c\u9396\u5b9a\u7684\u6a5f\u5236\u3002\u8207\u9801\u7d1a\u9396\u6216\u8868\u7d1a\u9396\u76f8\u6bd4\uff0c\u884c\u7d1a\u9396\u7684\u7c92\u5ea6\u66f4\u7d30\uff0c\u80fd\u5920\u6709\u6548\u6e1b\u5c11\u9396\u7af6\u722d\uff0c\u63d0\u9ad8\u4e26\u767c\u6027\u80fd\u3002\u5728Oracle\u4e2d\uff0c\u884c\u7d1a\u9396\u4e3b\u8981\u7528\u65bc\u4fdd\u8b77\u6b63\u5728\u88ab\u4fee\u6539\u7684\u6578\u64da\u884c\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u5c0d\u5176\u9032\u884c\u4fee\u6539\u3002<\/p>\n<h2 id=\"%e8%a1%8c%e7%b4%9a%e9%8e%96%e7%9a%84%e9%a1%9e%e5%9e%8b-fjNrQEJfAV\">\u884c\u7d1a\u9396\u7684\u985e\u578b<\/h2>\n<p>Oracle\u8cc7\u6599\u5eab\u4e2d\u7684\u884c\u7d1a\u9396\u4e3b\u8981\u6709\u5169\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/strong>\uff1a\u7576\u4e00\u500b\u4e8b\u52d9\u5c0d\u67d0\u4e00\u884c\u52a0\u4e0a\u6392\u4ed6\u9396\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u884c\u9032\u884c\u4efb\u4f55\u4fee\u6539\u64cd\u4f5c\uff0c\u76f4\u5230\u8a72\u9396\u88ab\u91cb\u653e\u3002<\/li>\n<li><strong>\u5171\u4eab\u9396\uff08Shared Lock\uff09<\/strong>\uff1a\u7576\u4e00\u500b\u4e8b\u52d9\u5c0d\u67d0\u4e00\u884c\u52a0\u4e0a\u5171\u4eab\u9396\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u53ef\u4ee5\u5c0d\u8a72\u884c\u9032\u884c\u8b80\u53d6\u64cd\u4f5c\uff0c\u4f46\u7121\u6cd5\u9032\u884c\u4fee\u6539\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a1%8c%e7%b4%9a%e9%8e%96%e7%9a%84%e7%89%b9%e6%ae%8a%e7%94%a8%e6%b3%95-fjNrQEJfAV\">\u884c\u7d1a\u9396\u7684\u7279\u6b8a\u7528\u6cd5<\/h2>\n<p>\u884c\u7d1a\u9396\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u6709\u591a\u7a2e\u7279\u6b8a\u7528\u6cd5\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u5834\u666f\uff1a<\/p>\n<h3 id=\"1-%e9%98%b2%e6%ad%a2%e5%b9%bb%e8%ae%80-fjNrQEJfAV\">1. \u9632\u6b62\u5e7b\u8b80<\/h3>\n<p>\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\uff0c\u5e7b\u8b80\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u5728\u8b80\u53d6\u6578\u64da\u6642\uff0c\u53e6\u4e00\u500b\u4e8b\u52d9\u53ef\u80fd\u6703\u63d2\u5165\u65b0\u7684\u6578\u64da\u884c\uff0c\u5c0e\u81f4\u524d\u8005\u7684\u7d50\u679c\u4e0d\u4e00\u81f4\u3002\u4f7f\u7528\u884c\u7d1a\u9396\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u9019\u7a2e\u60c5\u6cc1\u7684\u767c\u751f\u3002\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u9700\u8981\u67e5\u8a62\u67d0\u500b\u7bc4\u570d\u5167\u7684\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u5728\u67e5\u8a62\u6642\u52a0\u4e0a\u884c\u7d1a\u9396\uff0c\u78ba\u4fdd\u5728\u67e5\u8a62\u904e\u7a0b\u4e2d\u4e0d\u6703\u6709\u5176\u4ed6\u4e8b\u52d9\u63d2\u5165\u65b0\u7684\u6578\u64da\u884c\u3002<\/p>\n<pre><code>SELECT * FROM employees WHERE department_id = 10 FOR UPDATE;\n<\/code><\/pre>\n<h3 id=\"2-%e6%8f%90%e9%ab%98%e4%b8%a6%e7%99%bc%e6%80%a7%e8%83%bd-fjNrQEJfAV\">2. \u63d0\u9ad8\u4e26\u767c\u6027\u80fd<\/h3>\n<p>\u884c\u7d1a\u9396\u7684\u7d30\u7c92\u5ea6\u7279\u6027\u4f7f\u5f97\u591a\u500b\u4e8b\u52d9\u53ef\u4ee5\u540c\u6642\u5c0d\u4e0d\u540c\u7684\u884c\u9032\u884c\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u4e26\u767c\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u5927\u578b\u7684\u96fb\u5b50\u5546\u52d9\u7cfb\u7d71\u4e2d\uff0c\u6578\u767e\u540d\u7528\u6236\u53ef\u80fd\u540c\u6642\u5c0d\u4e0d\u540c\u7684\u5546\u54c1\u9032\u884c\u8cfc\u8cb7\u64cd\u4f5c\u3002\u4f7f\u7528\u884c\u7d1a\u9396\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u500b\u7528\u6236\u7684\u64cd\u4f5c\u4e0d\u6703\u4e92\u76f8\u5e72\u64fe\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u7684\u4ea4\u6613\u6548\u7387\u3002<\/p>\n<h3 id=\"3-%e4%ba%8b%e5%8b%99%e7%9a%84%e9%9a%94%e9%9b%a2%e6%80%a7-fjNrQEJfAV\">3. \u4e8b\u52d9\u7684\u9694\u96e2\u6027<\/h3>\n<p>\u884c\u7d1a\u9396\u9084\u80fd\u5920\u5e6b\u52a9\u5be6\u73fe\u4e8b\u52d9\u7684\u9694\u96e2\u6027\u3002\u5728\u4e00\u500b\u4e8b\u52d9\u4e2d\u5c0d\u67d0\u4e00\u884c\u52a0\u9396\u5f8c\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u884c\u9032\u884c\u4fee\u6539\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u4e8b\u52d9\u7684\u539f\u5b50\u6027\u548c\u4e00\u81f4\u6027\u3002\u4f8b\u5982\uff0c\u5728\u9280\u884c\u8f49\u8cec\u64cd\u4f5c\u4e2d\uff0c\u5c0d\u65bc\u8f49\u51fa\u548c\u8f49\u5165\u7684\u8cec\u6236\u884c\u90fd\u9700\u8981\u52a0\u4e0a\u884c\u7d1a\u9396\uff0c\u4ee5\u9632\u6b62\u5728\u8f49\u8cec\u904e\u7a0b\u4e2d\u51fa\u73fe\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/p>\n<pre><code>UPDATE accounts SET balance = balance - 100 WHERE account_id = 1 FOR UPDATE;\nUPDATE accounts SET balance = balance + 100 WHERE account_id = 2 FOR UPDATE;\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-fjNrQEJfAV\">\u7d50\u8ad6<\/h2>\n<p>\u884c\u7d1a\u9396\u5728Oracle\u8cc7\u6599\u5eab\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u7cfb\u7d71\u7684\u4e26\u767c\u6027\u80fd\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u884c\u7d1a\u9396\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\uff0c\u5f9e\u800c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u5728\u9078\u64c7\u5408\u9069\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\u6642\uff0c\u4e86\u89e3\u884c\u7d1a\u9396\u7684\u7279\u6b8a\u7528\u6cd5\u5c07\u6709\u52a9\u65bc\u66f4\u597d\u5730\u8a2d\u8a08\u548c\u512a\u5316\u7cfb\u7d71\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u53ca<code><a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u8a0eOracle\u884c\u7d1a\u9396\u7684\u7279\u6b8a\u7528\u6cd5\uff0c\u89e3\u6790\u5176\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u61c9\u7528\u53ca\u512a\u52e2\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u6578\u64da\u4e00\u81f4\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-171341","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171341","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=171341"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171341\/revisions"}],"predecessor-version":[{"id":171342,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171341\/revisions\/171342"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=171341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=171341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=171341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}