{"id":95832,"date":"2024-10-20T04:22:21","date_gmt":"2024-10-19T20:22:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95832\/"},"modified":"2024-10-20T04:22:21","modified_gmt":"2024-10-19T20:22:21","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8e%96%e7%9a%84%e5%b8%b8%e7%94%a8%e9%a1%9e%e5%9e%8b%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95832\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u9396\u7684\u5e38\u7528\u985e\u578b\u6709\u54ea\u4e9b"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8e%96%e7%9a%84%e5%b8%b8%e7%94%a8%e9%a1%9e%e5%9e%8b%e6%9c%89%e5%93%aa%e4%ba%9b-gpjpDJpdli\">Oracle\u6578\u64da\u5eab\u9396\u7684\u5e38\u7528\u985e\u578b\u6709\u54ea\u4e9b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u9396\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u6a5f\u5236\u3002Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u7684\u985e\u578b\uff0c\u4ee5\u61c9\u5c0d\u4e0d\u540c\u7684\u4e26\u767c\u8a2a\u554f\u9700\u6c42\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u6578\u64da\u5eab\u4e2d\u5e38\u7528\u7684\u9396\u985e\u578b\u53ca\u5176\u7279\u9ede\u3002<\/p>\n<h2 id=\"1-%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-gpjpDJpdli\">1. \u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u9396\u662f\u7528\u4f86\u63a7\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u5728\u88ab\u591a\u500b\u7528\u6236\u540c\u6642\u8a2a\u554f\u6642\u51fa\u73fe\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002Oracle\u6578\u64da\u5eab\u4e2d\u7684\u9396\u53ef\u4ee5\u5206\u70ba\u5169\u5927\u985e\uff1a\u884c\u7d1a\u9396\u548c\u8868\u7d1a\u9396\u3002<\/p>\n<h2 id=\"2-%e8%a1%8c%e7%b4%9a%e9%8e%96-gpjpDJpdli\">2. \u884c\u7d1a\u9396<\/h2>\n<p>\u884c\u7d1a\u9396\u662f\u6307\u5c0d\u6578\u64da\u8868\u4e2d\u7684\u67d0\u4e00\u884c\u9032\u884c\u9396\u5b9a\uff0c\u9019\u6a23\u5176\u4ed6\u7528\u6236\u5728\u672a\u7372\u5f97\u8a72\u884c\u9396\u7684\u60c5\u6cc1\u4e0b\u7121\u6cd5\u5c0d\u5176\u9032\u884c\u4fee\u6539\u3002\u884c\u7d1a\u9396\u7684\u512a\u9ede\u5728\u65bc\u5b83\u80fd\u5920\u63d0\u9ad8\u4e26\u767c\u6027\uff0c\u56e0\u70ba\u591a\u500b\u7528\u6236\u53ef\u4ee5\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8868\u4e2d\u7684\u4e0d\u540c\u6578\u64da\u884c\u3002<\/p>\n<h3 id=\"2-1-%e5%85%b1%e4%ba%ab%e9%8e%96%ef%bc%88share-lock%ef%bc%89-gpjpDJpdli\">2.1 \u5171\u4eab\u9396\uff08Share Lock\uff09<\/h3>\n<p>\u5171\u4eab\u9396\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u540c\u4e00\u884c\u6578\u64da\uff0c\u4f46\u4e0d\u5141\u8a31\u4efb\u4f55\u4e8b\u52d9\u5c0d\u8a72\u884c\u6578\u64da\u9032\u884c\u4fee\u6539\u3002\u9019\u7a2e\u9396\u901a\u5e38\u5728\u67e5\u8a62\u64cd\u4f5c\u4e2d\u4f7f\u7528\u3002<\/p>\n<h3 id=\"2-2-%e6%8e%92%e4%bb%96%e9%8e%96%ef%bc%88exclusive-lock%ef%bc%89-gpjpDJpdli\">2.2 \u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/h3>\n<p>\u6392\u4ed6\u9396\u5247\u662f\u5c0d\u67d0\u4e00\u884c\u6578\u64da\u7684\u7368\u5360\u9396\u5b9a\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u7372\u5f97\u6392\u4ed6\u9396\u5f8c\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u884c\u9032\u884c\u8b80\u53d6\u6216\u4fee\u6539\u3002\u9019\u7a2e\u9396\u901a\u5e38\u5728\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u4e2d\u4f7f\u7528\u3002<\/p>\n<h2 id=\"3-%e8%a1%a8%e7%b4%9a%e9%8e%96-gpjpDJpdli\">3. \u8868\u7d1a\u9396<\/h2>\n<p>\u8868\u7d1a\u9396\u662f\u6307\u5c0d\u6574\u500b\u6578\u64da\u8868\u9032\u884c\u9396\u5b9a\uff0c\u9019\u610f\u5473\u8457\u5728\u9396\u5b9a\u671f\u9593\uff0c\u5176\u4ed6\u7528\u6236\u7121\u6cd5\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002\u8868\u7d1a\u9396\u7684\u4f7f\u7528\u901a\u5e38\u6703\u964d\u4f4e\u7cfb\u7d71\u7684\u4e26\u767c\u6027\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u662f\u5fc5\u8981\u7684\u3002<\/p>\n<h3 id=\"3-1-%e5%85%b1%e4%ba%ab%e8%a1%a8%e9%8e%96%ef%bc%88share-table-lock%ef%bc%89-gpjpDJpdli\">3.1 \u5171\u4eab\u8868\u9396\uff08Share Table Lock\uff09<\/h3>\n<p>\u5171\u4eab\u8868\u9396\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u6574\u500b\u8868\uff0c\u4f46\u4e0d\u5141\u8a31\u4efb\u4f55\u4e8b\u52d9\u5c0d\u8868\u9032\u884c\u4fee\u6539\u3002\u9019\u7a2e\u9396\u901a\u5e38\u5728\u9700\u8981\u9032\u884c\u591a\u6b21\u67e5\u8a62\u7684\u60c5\u6cc1\u4e0b\u4f7f\u7528\u3002<\/p>\n<h3 id=\"3-2-%e6%8e%92%e4%bb%96%e8%a1%a8%e9%8e%96%ef%bc%88exclusive-table-lock%ef%bc%89-gpjpDJpdli\">3.2 \u6392\u4ed6\u8868\u9396\uff08Exclusive Table Lock\uff09<\/h3>\n<p>\u6392\u4ed6\u8868\u9396\u5247\u662f\u5c0d\u6574\u500b\u8868\u7684\u7368\u5360\u9396\u5b9a\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u7372\u5f97\u6392\u4ed6\u8868\u9396\u5f8c\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002\u9019\u7a2e\u9396\u901a\u5e38\u5728\u9032\u884c\u5927\u898f\u6a21\u66f4\u65b0\u6216\u7d50\u69cb\u8b8a\u66f4\u6642\u4f7f\u7528\u3002<\/p>\n<h2 id=\"4-%e8%87%aa%e5%8b%95%e9%8e%96%e5%92%8c%e6%89%8b%e5%8b%95%e9%8e%96-gpjpDJpdli\">4. \u81ea\u52d5\u9396\u548c\u624b\u52d5\u9396<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u9396\u7684\u7372\u53d6\u53ef\u4ee5\u662f\u81ea\u52d5\u7684\uff0c\u4e5f\u53ef\u4ee5\u662f\u624b\u52d5\u7684\u3002\u81ea\u52d5\u9396\u662f\u6307\u5728\u57f7\u884cDML\uff08\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff09\u8a9e\u53e5\u6642\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u81ea\u52d5\u70ba\u76f8\u95dc\u6578\u64da\u884c\u6216\u8868\u7372\u53d6\u9396\u3002\u800c\u624b\u52d5\u9396\u5247\u662f\u7528\u6236\u53ef\u4ee5\u901a\u904e\u7279\u5b9a\u7684SQL\u8a9e\u53e5\u4f86\u986f\u5f0f\u5730\u7372\u53d6\u6216\u91cb\u653e\u9396\u3002<\/p>\n<h3 id=\"4-1-%e8%87%aa%e5%8b%95%e9%8e%96%e7%a4%ba%e4%be%8b-gpjpDJpdli\">4.1 \u81ea\u52d5\u9396\u793a\u4f8b<\/h3>\n<pre><code>UPDATE employees SET salary = salary * 1.1 WHERE department_id = 10;<\/code><\/pre>\n<p>\u5728\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u6642\uff0cOracle\u6703\u81ea\u52d5\u70ba\u88ab\u66f4\u65b0\u7684\u884c\u7372\u53d6\u6392\u4ed6\u9396\u3002<\/p>\n<h3 id=\"4-2-%e6%89%8b%e5%8b%95%e9%8e%96%e7%a4%ba%e4%be%8b-gpjpDJpdli\">4.2 \u624b\u52d5\u9396\u793a\u4f8b<\/h3>\n<pre><code>LOCK TABLE employees IN EXCLUSIVE MODE;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u6703\u5c0d\u6574\u500bemployees\u8868\u7372\u53d6\u6392\u4ed6\u9396\uff0c\u76f4\u5230\u7528\u6236\u91cb\u653e\u9396\u6216\u6703\u8a71\u7d50\u675f\u3002<\/p>\n<h2 id=\"5-%e9%8e%96%e7%9a%84%e7%ae%a1%e7%90%86-gpjpDJpdli\">5. \u9396\u7684\u7ba1\u7406<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u8996\u5716\u4f86\u7ba1\u7406\u548c\u76e3\u63a7\u9396\u7684\u72c0\u614b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u67e5\u770b\u7576\u524d\u7684\u9396\u5b9a\u60c5\u6cc1\uff1a<\/p>\n<pre><code>SELECT * FROM v$lock;<\/code><\/pre>\n<p>\u9019\u500b\u8996\u5716\u63d0\u4f9b\u4e86\u7576\u524d\u6240\u6709\u9396\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u9396\u7684\u985e\u578b\u3001\u72c0\u614b\u548c\u6301\u6709\u8005\u7b49\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gpjpDJpdli\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u4e2d\u7684\u9396\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u95dc\u9375\u6a5f\u5236\u3002\u4e86\u89e3\u4e0d\u540c\u985e\u578b\u7684\u9396\u53ca\u5176\u4f7f\u7528\u5834\u666f\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u7684\u4e26\u767c\u8a2a\u554f\u3002\u7121\u8ad6\u662f\u884c\u7d1a\u9396\u9084\u662f\u8868\u7d1a\u9396\uff0c\u6b63\u78ba\u7684\u9396\u7ba1\u7406\u7b56\u7565\u90fd\u80fd\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u904b\u884c\u74b0\u5883\u6709\u66f4\u9ad8\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u63d0\u5347\u60a8\u7684\u6578\u64da\u5eab\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle\u6578\u64da\u5eab\u4e2d\u5e38\u7528\u7684\u9396\u985e\u578b\uff0c\u5305\u62ec\u884c\u9396\u3001\u8868\u9396\u548c\u610f\u5411\u9396\uff0c\u63d0\u5347\u6578\u64da\u4e00\u81f4\u6027\u8207\u6027\u80fd\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-95832","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95832","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=95832"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95832\/revisions"}],"predecessor-version":[{"id":95833,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95832\/revisions\/95833"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95832"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}