{"id":161231,"date":"2024-11-04T04:42:27","date_gmt":"2024-11-03T20:42:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161231\/"},"modified":"2024-11-04T04:42:28","modified_gmt":"2024-11-03T20:42:28","slug":"%e5%9f%ba%e6%96%bc-oracle-%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%a0%b1%e8%a1%a8%e7%89%88%e6%9c%ac%e4%bf%9d%e5%ad%98%e5%b7%a5%e5%85%b7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161231\/","title":{"rendered":"\u57fa\u65bc Oracle \u89f8\u767c\u5668\u7684\u5831\u8868\u7248\u672c\u4fdd\u5b58\u5de5\u5177"},"content":{"rendered":"

\u57fa\u65bc Oracle \u89f8\u767c\u5668\u7684\u5831\u8868\u7248\u672c\u4fdd\u5b58\u5de5\u5177<\/h1>\n

\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u74b0\u5883\u4e2d\uff0c\u4f01\u696d\u9700\u8981\u6709\u6548\u7684\u5de5\u5177\u4f86\u7ba1\u7406\u548c\u4fdd\u5b58\u5831\u8868\u7248\u672c\u3002Oracle \u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u89f8\u767c\u5668\u529f\u80fd\uff0c\u80fd\u5920\u81ea\u52d5\u5316\u9019\u4e00\u904e\u7a0b\uff0c\u78ba\u4fdd\u5831\u8868\u7684\u6b77\u53f2\u7248\u672c\u80fd\u5920\u88ab\u59a5\u5584\u4fdd\u5b58\u548c\u7ba1\u7406\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u57fa\u65bc Oracle \u89f8\u767c\u5668\u4f86\u5be6\u73fe\u5831\u8868\u7248\u672c\u7684\u4fdd\u5b58\u5de5\u5177\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u4ec0\u9ebc\u662f Oracle \u89f8\u767c\u5668\uff1f<\/h2>\n

Oracle \u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u6703\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002\u9019\u4e9b\u4e8b\u4ef6\u53ef\u4ee5\u662f\u5c0d\u6578\u64da\u8868\u7684\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u3002\u89f8\u767c\u5668\u7684\u4e3b\u8981\u7528\u9014\u662f\u81ea\u52d5\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\uff0c\u4f8b\u5982\u6578\u64da\u9a57\u8b49\u3001\u65e5\u8a8c\u8a18\u9304\u6216\u81ea\u52d5\u8a08\u7b97\u3002<\/p>\n

\u5831\u8868\u7248\u672c\u4fdd\u5b58\u7684\u9700\u6c42<\/h2>\n

\u5728\u8a31\u591a\u696d\u52d9\u5834\u666f\u4e2d\uff0c\u5831\u8868\u7684\u7248\u672c\u63a7\u5236\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u5831\u8868\u7684\u5167\u5bb9\u53ef\u80fd\u6703\u767c\u751f\u8b8a\u5316\uff0c\u56e0\u6b64\u9700\u8981\u4fdd\u5b58\u6bcf\u500b\u7248\u672c\u4ee5\u4fbf\u65bc\u67e5\u8a62\u548c\u5be9\u8a08\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u6578\u64da\u7684\u900f\u660e\u6027\uff0c\u9084\u80fd\u5728\u9700\u8981\u6642\u63d0\u4f9b\u6b77\u53f2\u6578\u64da\u7684\u56de\u6eaf\u3002<\/p>\n

\u8a2d\u8a08\u5831\u8868\u7248\u672c\u4fdd\u5b58\u5de5\u5177<\/h2>\n

\u70ba\u4e86\u5be6\u73fe\u5831\u8868\u7248\u672c\u7684\u4fdd\u5b58\uff0c\u6211\u5011\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u540d\u70ba report_versions<\/code> \u7684\u6578\u64da\u8868\uff0c\u8a72\u8868\u5c07\u5b58\u5132\u6bcf\u500b\u5831\u8868\u7684\u7248\u672c\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u8a72\u8868\u7684\u8a2d\u8a08\u793a\u4f8b\uff1a<\/p>\n

CREATE TABLE report_versions (\n    id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,\n    report_name VARCHAR2(255),\n    report_content CLOB,\n    version_number NUMBER,\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);\n<\/code><\/pre>\n
\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u89f8\u767c\u5668\uff0c\u7576\u5831\u8868\u88ab\u66f4\u65b0\u6642\uff0c\u81ea\u52d5\u5c07\u5176\u7248\u672c\u4fdd\u5b58\u5230 report_versions<\/code> \u8868\u4e2d\u3002\u4ee5\u4e0b\u662f\u89f8\u767c\u5668\u7684\u793a\u4f8b\u4ee3\u78bc\uff1a<\/p>\n
CREATE OR REPLACE TRIGGER trg_save_report_version\nAFTER UPDATE ON reports\nFOR EACH ROW\nBEGIN\n    INSERT INTO report_versions (report_name, report_content, version_number)\n    VALUES (:OLD.report_name, :OLD.report_content, :OLD.version_number + 1);\nEND;\n<\/code><\/pre>\n
\u5728\u9019\u500b\u89f8\u767c\u5668\u4e2d\uff0c\u7576 reports<\/code> \u8868\u4e2d\u7684\u5831\u8868\u88ab\u66f4\u65b0\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u5c07\u820a\u7248\u672c\u7684\u5831\u8868\u540d\u7a31\u3001\u5167\u5bb9\u548c\u7248\u672c\u865f\u63d2\u5165\u5230 report_versions<\/code> \u8868\u4e2d\u3002\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u4fdd\u7559\u6bcf\u6b21\u66f4\u65b0\u524d\u7684\u5831\u8868\u7248\u672c\u3002<\/p>\n
\u67e5\u8a62\u5831\u8868\u7248\u672c<\/h2>\n
\u70ba\u4e86\u67e5\u8a62\u7279\u5b9a\u5831\u8868\u7684\u6b77\u53f2\u7248\u672c\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM report_versions\nWHERE report_name = 'your_report_name'\nORDER BY version_number DESC;\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6307\u5b9a\u5831\u8868\u7684\u6240\u6709\u7248\u672c\uff0c\u4e26\u6309\u7167\u7248\u672c\u865f\u964d\u5e8f\u6392\u5217\uff0c\u65b9\u4fbf\u7528\u6236\u67e5\u770b\u6700\u65b0\u7684\u7248\u672c\u4fe1\u606f\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u57fa\u65bc Oracle \u89f8\u767c\u5668\u7684\u5831\u8868\u7248\u672c\u4fdd\u5b58\u5de5\u5177\u80fd\u5920\u6709\u6548\u5730\u5e6b\u52a9\u4f01\u696d\u7ba1\u7406\u5831\u8868\u7684\u6b77\u53f2\u7248\u672c\u3002\u901a\u904e\u81ea\u52d5\u5316\u7684\u65b9\u5f0f\uff0c\u4f01\u696d\u4e0d\u50c5\u80fd\u5920\u7bc0\u7701\u6642\u9593\uff0c\u9084\u80fd\u63d0\u9ad8\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u53ef\u9760\u6027\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9019\u7a2e\u5de5\u5177\u7684\u50f9\u503c\u5c07\u6108\u52a0\u51f8\u986f\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u696d\u52d9\u4e2d\u5be6\u65bd\u9019\u6a23\u7684\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc \u9999\u6e2fVPS<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u548c\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u57fa\u65bc Oracle \u89f8\u767c\u5668\u7684\u5831\u8868\u7248\u672c\u4fdd\u5b58\u5de5\u5177\uff0c\u5be6\u73fe\u81ea\u52d5\u5316\u5831\u8868\u7248\u672c\u7ba1\u7406\uff0c\u63d0\u5347\u6578\u64da\u8ffd\u8e64\u8207\u5be9\u8a08\u6548\u7387\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-161231","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161231","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=161231"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161231\/revisions"}],"predecessor-version":[{"id":161232,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161231\/revisions\/161232"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}