{"id":182424,"date":"2024-11-09T22:20:17","date_gmt":"2024-11-09T14:20:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/182424\/"},"modified":"2024-11-09T22:20:18","modified_gmt":"2024-11-09T14:20:18","slug":"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e5%bd%b1%e5%ad%90%e8%a1%a8%e5%8f%8a%e5%85%b6%e4%bd%9c%e7%94%a8%ef%bc%9f%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e5%bd%b1%e5%ad%90%e8%a1%a8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/182424\/","title":{"rendered":"\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u5f71\u5b50\u8868\u53ca\u5176\u4f5c\u7528\uff1f\uff08\u6578\u64da\u5eab\u5f71\u5b50\u8868\uff09"},"content":{"rendered":"

\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u5f71\u5b50\u8868\u53ca\u5176\u4f5c\u7528\uff1f\uff08\u6578\u64da\u5eab\u5f71\u5b50\u8868\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u7dad\u8b77\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u6578\u64da\u5eab\u5f71\u5b50\u8868\uff08Shadow Table\uff09\u662f\u4e00\u7a2e\u5728\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u4f7f\u7528\u7684\u6280\u8853\uff0c\u65e8\u5728\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u5b8c\u6574\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u5f71\u5b50\u8868\u7684\u5b9a\u7fa9\u3001\u4f5c\u7528\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n

\u6578\u64da\u5eab\u5f71\u5b50\u8868\u7684\u5b9a\u7fa9<\/h2>\n

\u6578\u64da\u5eab\u5f71\u5b50\u8868\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u6578\u64da\u8868\uff0c\u901a\u5e38\u7528\u65bc\u5b58\u5132\u4e3b\u8868\u7684\u526f\u672c\u6216\u5feb\u7167\u3002\u9019\u4e9b\u5f71\u5b50\u8868\u53ef\u4ee5\u5728\u4e3b\u8868\u767c\u751f\u8b8a\u66f4\u6642\u81ea\u52d5\u66f4\u65b0\uff0c\u5f9e\u800c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u5f71\u5b50\u8868\u7684\u8a2d\u8a08\u65e8\u5728\u63d0\u4f9b\u4e00\u500b\u5b89\u5168\u7684\u6578\u64da\u6062\u5fa9\u65b9\u6848\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u640d\u58de\u6216\u4e1f\u5931\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n

\u6578\u64da\u5eab\u5f71\u5b50\u8868\u7684\u4f5c\u7528<\/h2>\n

1. \u6578\u64da\u6062\u5fa9<\/h3>\n

\u6578\u64da\u5eab\u5f71\u5b50\u8868\u7684\u4e3b\u8981\u4f5c\u7528\u4e4b\u4e00\u662f\u63d0\u4f9b\u6578\u64da\u6062\u5fa9\u7684\u80fd\u529b\u3002\u5728\u6578\u64da\u4e1f\u5931\u6216\u640d\u58de\u7684\u60c5\u6cc1\u4e0b\uff0c\u5f71\u5b50\u8868\u53ef\u4ee5\u4f5c\u70ba\u4e00\u500b\u53ef\u9760\u7684\u5099\u4efd\u4f86\u6e90\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u6578\u64da\u5b8c\u6574\u6027\u7684\u61c9\u7528\u7a0b\u5e8f\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n

2. \u6578\u64da\u4e00\u81f4\u6027<\/h3>\n

\u5f71\u5b50\u8868\u53ef\u4ee5\u5e6b\u52a9\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u7576\u4e3b\u8868\u4e2d\u7684\u6578\u64da\u767c\u751f\u8b8a\u66f4\u6642\uff0c\u5f71\u5b50\u8868\u53ef\u4ee5\u81ea\u52d5\u66f4\u65b0\uff0c\u5f9e\u800c\u4fdd\u6301\u6578\u64da\u7684\u540c\u6b65\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5be6\u6642\u6578\u64da\u66f4\u65b0\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n

3. \u6e2c\u8a66\u548c\u958b\u767c<\/h3>\n

\u5728\u958b\u767c\u548c\u6e2c\u8a66\u968e\u6bb5\uff0c\u5f71\u5b50\u8868\u53ef\u4ee5\u7528\u4f86\u9032\u884c\u6578\u64da\u6e2c\u8a66\uff0c\u800c\u4e0d\u6703\u5f71\u97ff\u4e3b\u8868\u7684\u6578\u64da\u3002\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u5728\u5f71\u5b50\u8868\u4e2d\u9032\u884c\u5404\u7a2e\u64cd\u4f5c\uff0c\u7136\u5f8c\u518d\u5c07\u8b8a\u66f4\u61c9\u7528\u5230\u4e3b\u8868\u4e2d\uff0c\u9019\u6a23\u53ef\u4ee5\u964d\u4f4e\u932f\u8aa4\u7684\u98a8\u96aa\u3002<\/p>\n

4. \u6027\u80fd\u512a\u5316<\/h3>\n

\u5f71\u5b50\u8868\u9084\u53ef\u4ee5\u7528\u65bc\u6027\u80fd\u512a\u5316\u3002\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u901a\u904e\u5c07\u8b80\u53d6\u64cd\u4f5c\u6307\u5411\u5f71\u5b50\u8868\uff0c\u53ef\u4ee5\u6e1b\u8f15\u4e3b\u8868\u7684\u8ca0\u64d4\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u7cfb\u7d71\u7684\u6027\u80fd\u3002<\/p>\n

\u6578\u64da\u5eab\u5f71\u5b50\u8868\u7684\u5be6\u73fe<\/h2>\n

\u5be6\u73fe\u6578\u64da\u5eab\u5f71\u5b50\u8868\u7684\u65b9\u5f0f\u6709\u591a\u7a2e\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728MySQL\u4e2d\u5275\u5efa\u5f71\u5b50\u8868\uff1a<\/p>\n

CREATE TABLE main_table (\n    id INT PRIMARY KEY,\n    data VARCHAR(255)\n);\n\nCREATE TABLE shadow_table LIKE main_table;\n\n-- \u7576\u4e3b\u8868\u6578\u64da\u66f4\u65b0\u6642\uff0c\u5f71\u5b50\u8868\u4e5f\u9700\u8981\u66f4\u65b0\nINSERT INTO main_table (id, data) VALUES (1, 'Sample Data');\nINSERT INTO shadow_table (id, data) SELECT id, data FROM main_table WHERE id = 1;\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5275\u5efa\u4e86\u4e00\u500b\u4e3b\u8868\u548c\u4e00\u500b\u5f71\u5b50\u8868\u3002\u7136\u5f8c\uff0c\u7576\u4e3b\u8868\u63d2\u5165\u6578\u64da\u6642\uff0c\u6211\u5011\u4e5f\u5c07\u76f8\u61c9\u7684\u6578\u64da\u63d2\u5165\u5230\u5f71\u5b50\u8868\u4e2d\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5f71\u5b50\u8868\u59cb\u7d42\u4fdd\u6301\u6700\u65b0\u72c0\u614b\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u6578\u64da\u5eab\u5f71\u5b50\u8868\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6280\u8853\uff0c\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u3001\u4e00\u81f4\u6027\u548c\u6027\u80fd\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u6062\u5fa9\u3001\u6e2c\u8a66\u958b\u767c\u9084\u662f\u6027\u80fd\u512a\u5316\u65b9\u9762\uff0c\u5f71\u5b50\u8868\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u61c9\u7528\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u5f71\u5b50\u8868\u7684\u4f7f\u7528\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6216\u662f\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc \u9999\u6e2fVPS<\/a> \u53ca\u5176\u76f8\u95dc\u670d\u52d9\u7684\u4fe1\u606f\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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