{"id":170501,"date":"2024-11-06T22:29:21","date_gmt":"2024-11-06T14:29:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/170501\/"},"modified":"2024-11-06T22:29:22","modified_gmt":"2024-11-06T14:29:22","slug":"%e6%89%b9%e8%99%95%e7%90%86%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8%e5%8f%8a%e5%85%b6%e5%83%b9%e5%80%bc%e6%8e%a2%e6%9e%90-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/170501\/","title":{"rendered":"\u6279\u8655\u7406\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u53ca\u5176\u50f9\u503c\u63a2\u6790 (\u6578\u64da\u5eab\u4e2d\u7684\u6279\u8655\u7406\u6709\u4ec0\u9ebc\u7528)"},"content":{"rendered":"

\u6279\u8655\u7406\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u53ca\u5176\u50f9\u503c\u63a2\u6790<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u6fc0\u589e\uff0c\u5982\u4f55\u9ad8\u6548\u5730\u8655\u7406\u548c\u7ba1\u7406\u9019\u4e9b\u6578\u64da\u6210\u70ba\u4e86\u4f01\u696d\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002\u6279\u8655\u7406\uff08Batch Processing\uff09\u4f5c\u70ba\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u8655\u7406\u65b9\u5f0f\uff0c\u9010\u6f38\u53d7\u5230\u91cd\u8996\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6279\u8655\u7406\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u53ca\u5176\u50f9\u503c\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6279\u8655\u7406\uff1f<\/h2>\n

\u6279\u8655\u7406\u662f\u4e00\u7a2e\u5c07\u591a\u500b\u6578\u64da\u64cd\u4f5c\u96c6\u4e2d\u5728\u4e00\u8d77\u9032\u884c\u8655\u7406\u7684\u6280\u8853\u3002\u8207\u5373\u6642\u8655\u7406\uff08Online Processing\uff09\u4e0d\u540c\uff0c\u6279\u8655\u7406\u901a\u5e38\u5728\u7279\u5b9a\u7684\u6642\u9593\u6bb5\u5167\u57f7\u884c\uff0c\u4e26\u4e14\u4e0d\u9700\u8981\u7528\u6236\u7684\u5373\u6642\u4ea4\u4e92\u3002\u9019\u7a2e\u65b9\u5f0f\u7279\u5225\u9069\u5408\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u5834\u666f\uff0c\u4f8b\u5982\u6578\u64da\u9077\u79fb\u3001\u5831\u544a\u751f\u6210\u548c\u6578\u64da\u6e05\u7406\u7b49\u3002<\/p>\n

\u6279\u8655\u7406\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528<\/h2>\n

1. \u6578\u64da\u9077\u79fb<\/h3>\n

\u5728\u4f01\u696d\u9032\u884c\u7cfb\u7d71\u5347\u7d1a\u6216\u66f4\u63db\u6578\u64da\u5eab\u6642\uff0c\u6578\u64da\u9077\u79fb\u662f\u4e00\u500b\u4e0d\u53ef\u907f\u514d\u7684\u904e\u7a0b\u3002\u6279\u8655\u7406\u53ef\u4ee5\u5c07\u5927\u91cf\u6578\u64da\u5f9e\u4e00\u500b\u6578\u64da\u5eab\u8f49\u79fb\u5230\u53e6\u4e00\u500b\u6578\u64da\u5eab\uff0c\u4e26\u4e14\u53ef\u4ee5\u5728\u9077\u79fb\u904e\u7a0b\u4e2d\u9032\u884c\u6578\u64da\u8f49\u63db\u548c\u6e05\u7406\u3002\u4f8b\u5982\uff0c\u4f7f\u7528SQL\u8a9e\u53e5\u9032\u884c\u6279\u91cf\u63d2\u5165\uff1a<\/p>\n

INSERT INTO new_table (column1, column2)\nSELECT column1, column2 FROM old_table;<\/code><\/pre>\n
2. \u6578\u64da\u5831\u544a\u751f\u6210<\/h3>\n
\u4f01\u696d\u901a\u5e38\u9700\u8981\u5b9a\u671f\u751f\u6210\u5404\u985e\u5831\u544a\uff0c\u4ee5\u4fbf\u9032\u884c\u696d\u52d9\u5206\u6790\u548c\u6c7a\u7b56\u3002\u6279\u8655\u7406\u53ef\u4ee5\u81ea\u52d5\u5316\u9019\u4e00\u904e\u7a0b\uff0c\u5b9a\u671f\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u4e26\u751f\u6210\u5831\u544a\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b9a\u6642\u4efb\u52d9\u4f86\u57f7\u884c\u5831\u544a\u751f\u6210\u7684SQL\u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM sales_data WHERE sale_date BETWEEN '2023-01-01' AND '2023-12-31';<\/code><\/pre>\n
3. \u6578\u64da\u6e05\u7406<\/h3>\n
\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u53ef\u80fd\u6703\u8b8a\u5f97\u5197\u9918\u6216\u4e0d\u4e00\u81f4\u3002\u6279\u8655\u7406\u53ef\u4ee5\u7528\u4f86\u5b9a\u671f\u6e05\u7406\u6578\u64da\uff0c\u522a\u9664\u91cd\u8907\u7684\u8a18\u9304\u6216\u66f4\u65b0\u904e\u6642\u7684\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u522a\u9664\u91cd\u8907\u8a18\u9304\uff1a<\/p>\n
DELETE FROM users\nWHERE id NOT IN (\n    SELECT MIN(id)\n    FROM users\n    GROUP BY email\n);<\/code><\/pre>\n
\u6279\u8655\u7406\u7684\u50f9\u503c<\/h2>\n
1. \u63d0\u9ad8\u6548\u7387<\/h3>\n
\u6279\u8655\u7406\u80fd\u5920\u5728\u975e\u9ad8\u5cf0\u6642\u6bb5\u96c6\u4e2d\u8655\u7406\u5927\u91cf\u6578\u64da\uff0c\u5f9e\u800c\u6e1b\u5c11\u5c0d\u7cfb\u7d71\u6027\u80fd\u7684\u5f71\u97ff\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u5229\u7528\u8cc7\u6e90\uff0c\u63d0\u9ad8\u6574\u9ad4\u6548\u7387\u3002<\/p>\n
2. \u964d\u4f4e\u6210\u672c<\/h3>\n
\u901a\u904e\u81ea\u52d5\u5316\u6578\u64da\u8655\u7406\u904e\u7a0b\uff0c\u4f01\u696d\u53ef\u4ee5\u6e1b\u5c11\u4eba\u529b\u6210\u672c\u548c\u6642\u9593\u6210\u672c\u3002\u6279\u8655\u7406\u7684\u5be6\u65bd\u53ef\u4ee5\u4f7f\u5f97\u6578\u64da\u8655\u7406\u8b8a\u5f97\u66f4\u52a0\u9ad8\u6548\uff0c\u5f9e\u800c\u964d\u4f4e\u904b\u71df\u6210\u672c\u3002<\/p>\n
3. \u589e\u5f37\u6578\u64da\u6e96\u78ba\u6027<\/h3>\n
\u6279\u8655\u7406\u53ef\u4ee5\u901a\u904e\u6a19\u6e96\u5316\u7684\u6d41\u7a0b\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u6e96\u78ba\u6027\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9ad8\u6578\u64da\u8cea\u91cf\u7684\u696d\u52d9\u6c7a\u7b56\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u6279\u8655\u7406\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u8655\u7406\u7684\u6548\u7387\uff0c\u9084\u964d\u4f4e\u4e86\u6210\u672c\uff0c\u589e\u5f37\u4e86\u6578\u64da\u7684\u6e96\u78ba\u6027\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u6301\u7e8c\u589e\u9577\uff0c\u6279\u8655\u7406\u5c07\u5728\u6578\u64da\u7ba1\u7406\u4e2d\u626e\u6f14\u8d8a\u4f86\u8d8a\u91cd\u8981\u7684\u89d2\u8272\u3002\u5c0d\u65bc\u5e0c\u671b\u63d0\u5347\u6578\u64da\u8655\u7406\u80fd\u529b\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u7406\u89e3\u548c\u61c9\u7528\u6279\u8655\u7406\u6280\u8853\u5c07\u662f\u672a\u4f86\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc \u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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