{"id":96078,"date":"2024-10-20T06:25:18","date_gmt":"2024-10-19T22:25:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96078\/"},"modified":"2024-10-20T06:25:19","modified_gmt":"2024-10-19T22:25:19","slug":"oracle%e9%8e%96%e7%9a%84%e5%85%a8%e9%83%a8%e9%a1%9e%e5%9e%8b%e7%9a%84%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96078\/","title":{"rendered":"Oracle\u9396\u7684\u5168\u90e8\u985e\u578b\u7684\u793a\u4f8b"},"content":{"rendered":"<h1 id=\"oracle%e9%8e%96%e7%9a%84%e5%85%a8%e9%83%a8%e9%a1%9e%e5%9e%8b%e7%9a%84%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">Oracle\u9396\u7684\u5168\u90e8\u985e\u578b\u7684\u793a\u4f8b<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u9396\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u6a5f\u5236\u3002Oracle\u8cc7\u6599\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u7684\u985e\u578b\uff0c\u4ee5\u61c9\u5c0d\u4e0d\u540c\u7684\u4e26\u767c\u63a7\u5236\u9700\u6c42\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u9396\u7684\u5404\u7a2e\u985e\u578b\u53ca\u5176\u793a\u4f8b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u4e3b\u984c\u3002<\/p>\n<h2 id=\"1-%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-tqGQBLqPhJ\">1. \u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u9396\u662f\u7528\u4f86\u63a7\u5236\u5c0d\u8cc7\u6599\u5eab\u8cc7\u6e90\u7684\u8a2a\u554f\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u640d\u58de\u6216\u4e0d\u4e00\u81f4\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u6b63\u5728\u8a2a\u554f\u67d0\u500b\u8cc7\u6e90\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u5fc5\u9808\u7b49\u5f85\uff0c\u76f4\u5230\u8a72\u4e8b\u52d9\u91cb\u653e\u9396\u3002Oracle\u8cc7\u6599\u5eab\u4e3b\u8981\u4f7f\u7528\u5169\u7a2e\u9396\uff1a\u884c\u9396\u548c\u8868\u9396\u3002<\/p>\n<h2 id=\"2-%e8%a1%8c%e9%8e%96%ef%bc%88row-locks%ef%bc%89-tqGQBLqPhJ\">2. \u884c\u9396\uff08Row Locks\uff09<\/h2>\n<p>\u884c\u9396\u662fOracle\u4e2d\u6700\u5e38\u7528\u7684\u9396\u985e\u578b\uff0c\u4e3b\u8981\u7528\u65bc\u4fdd\u8b77\u55ae\u500b\u884c\u7684\u6578\u64da\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u5c0d\u67d0\u884c\u6578\u64da\u9032\u884c\u4fee\u6539\u6642\uff0cOracle\u6703\u81ea\u52d5\u70ba\u8a72\u884c\u52a0\u9396\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u540c\u6642\u4fee\u6539\u3002<\/p>\n<h3 id=\"2-1-%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">2.1 \u793a\u4f8b<\/h3>\n<pre><code>UPDATE employees SET salary = salary * 1.1 WHERE employee_id = 100;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u4e8b\u52d9\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u6642\uff0cOracle\u6703\u5c0demployee_id\u70ba100\u7684\u884c\u52a0\u9396\uff0c\u76f4\u5230\u4e8b\u52d9\u63d0\u4ea4\u6216\u56de\u6efe\u3002<\/p>\n<h2 id=\"3-%e8%a1%a8%e9%8e%96%ef%bc%88table-locks%ef%bc%89-tqGQBLqPhJ\">3. \u8868\u9396\uff08Table Locks\uff09<\/h2>\n<p>\u8868\u9396\u662f\u7528\u65bc\u4fdd\u8b77\u6574\u500b\u8868\u7684\u6578\u64da\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u9700\u8981\u5c0d\u6574\u500b\u8868\u9032\u884c\u64cd\u4f5c\u6642\uff0cOracle\u6703\u52a0\u4e0a\u8868\u9396\uff0c\u9019\u6a23\u5176\u4ed6\u4e8b\u52d9\u5c31\u7121\u6cd5\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002<\/p>\n<h3 id=\"3-1-%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">3.1 \u793a\u4f8b<\/h3>\n<pre><code>LOCK TABLE employees IN EXCLUSIVE MODE;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u4e8b\u52d9\u5c0demployees\u8868\u52a0\u4e0a\u4e86\u7368\u4f54\u9396\uff0c\u9019\u610f\u5473\u8457\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u8b80\u53d6\u6216\u5beb\u5165\u64cd\u4f5c\uff0c\u76f4\u5230\u9396\u88ab\u91cb\u653e\u3002<\/p>\n<h2 id=\"4-%e5%85%b1%e4%ba%ab%e9%8e%96%ef%bc%88shared-locks%ef%bc%89-tqGQBLqPhJ\">4. \u5171\u4eab\u9396\uff08Shared Locks\uff09<\/h2>\n<p>\u5171\u4eab\u9396\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u540c\u4e00\u8cc7\u6e90\uff0c\u4f46\u4e0d\u5141\u8a31\u4efb\u4f55\u4e8b\u52d9\u5c0d\u8a72\u8cc7\u6e90\u9032\u884c\u4fee\u6539\u3002\u9019\u7a2e\u9396\u901a\u5e38\u7528\u65bc\u67e5\u8a62\u64cd\u4f5c\u3002<\/p>\n<h3 id=\"4-1-%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">4.1 \u793a\u4f8b<\/h3>\n<pre><code>SELECT * FROM employees WHERE department_id = 10;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0cOracle\u6703\u5c0d\u7b26\u5408\u689d\u4ef6\u7684\u884c\u52a0\u4e0a\u5171\u4eab\u9396\uff0c\u5141\u8a31\u5176\u4ed6\u4e8b\u52d9\u4e5f\u80fd\u8b80\u53d6\u9019\u4e9b\u884c\uff0c\u4f46\u4e0d\u5141\u8a31\u4fee\u6539\u3002<\/p>\n<h2 id=\"5-%e6%8e%92%e4%bb%96%e9%8e%96%ef%bc%88exclusive-locks%ef%bc%89-tqGQBLqPhJ\">5. \u6392\u4ed6\u9396\uff08Exclusive Locks\uff09<\/h2>\n<p>\u6392\u4ed6\u9396\u662f\u7528\u65bc\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u8b80\u53d6\u6216\u4fee\u6539\u88ab\u9396\u5b9a\u7684\u8cc7\u6e90\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u7372\u5f97\u6392\u4ed6\u9396\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u8cc7\u6e90\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002<\/p>\n<h3 id=\"5-1-%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">5.1 \u793a\u4f8b<\/h3>\n<pre><code>UPDATE employees SET salary = salary * 1.1 WHERE employee_id = 101;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u4e8b\u52d9\u5c0demployee_id\u70ba101\u7684\u884c\u9032\u884c\u66f4\u65b0\u6642\uff0cOracle\u6703\u52a0\u4e0a\u6392\u4ed6\u9396\uff0c\u76f4\u5230\u4e8b\u52d9\u5b8c\u6210\u3002<\/p>\n<h2 id=\"6-%e8%87%aa%e5%8b%95%e9%8e%96%ef%bc%88automatic-locks%ef%bc%89-tqGQBLqPhJ\">6. \u81ea\u52d5\u9396\uff08Automatic Locks\uff09<\/h2>\n<p>Oracle\u8cc7\u6599\u5eab\u5728\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\u6642\u6703\u81ea\u52d5\u52a0\u9396\uff0c\u4f8b\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u3002\u9019\u4e9b\u9396\u901a\u5e38\u662f\u884c\u9396\u6216\u8868\u9396\uff0c\u5177\u9ad4\u53d6\u6c7a\u65bc\u64cd\u4f5c\u7684\u7bc4\u570d\u3002<\/p>\n<h3 id=\"6-1-%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">6.1 \u793a\u4f8b<\/h3>\n<pre><code>INSERT INTO employees (employee_id, name, salary) VALUES (102, 'John Doe', 50000);\n<\/code><\/pre>\n<p>\u5728\u63d2\u5165\u64cd\u4f5c\u4e2d\uff0cOracle\u6703\u81ea\u52d5\u70ba\u65b0\u63d2\u5165\u7684\u884c\u52a0\u9396\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"7-%e9%8e%96%e7%9a%84%e7%ae%a1%e7%90%86-tqGQBLqPhJ\">7. \u9396\u7684\u7ba1\u7406<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u547d\u4ee4\u4f86\u7ba1\u7406\u9396\uff0c\u4f8b\u5982\u4f7f\u7528V$LOCK\u8996\u5716\u4f86\u67e5\u770b\u7576\u524d\u7684\u9396\u72c0\u614b\u3002\u9019\u5c0d\u65bc\u6392\u67e5\u6b7b\u9396\u548c\u6027\u80fd\u554f\u984c\u975e\u5e38\u6709\u5e6b\u52a9\u3002<\/p>\n<h3 id=\"7-1-%e7%a4%ba%e4%be%8b-tqGQBLqPhJ\">7.1 \u793a\u4f8b<\/h3>\n<pre><code>SELECT * FROM V$LOCK;\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u986f\u793a\u7576\u524d\u6240\u6709\u7684\u9396\u4fe1\u606f\uff0c\u5305\u62ec\u9396\u7684\u985e\u578b\u3001\u72c0\u614b\u548c\u6301\u6709\u8005\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-tqGQBLqPhJ\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3Oracle\u9396\u7684\u5404\u7a2e\u985e\u578b\u53ca\u5176\u4f7f\u7528\u60c5\u5883\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u6b63\u78ba\u4f7f\u7528\u9396\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u696d\u52d9\u4e2d\u5be6\u65bd\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8003\u616e\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u670d\u52d9\uff0c\u9019\u4e9b\u670d\u52d9\u80fd\u5920\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u9396\u7684\u5404\u7a2e\u985e\u578b\u53ca\u5176\u793a\u4f8b\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u6578\u64da\u5eab\u7684\u4e26\u767c\u6027\u548c\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-96078","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96078","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=96078"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96078\/revisions"}],"predecessor-version":[{"id":96079,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96078\/revisions\/96079"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}