{"id":183316,"date":"2024-11-10T03:48:25","date_gmt":"2024-11-09T19:48:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183316\/"},"modified":"2024-11-10T03:48:26","modified_gmt":"2024-11-09T19:48:26","slug":"%e5%af%a6%e7%8f%be%e8%b7%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e7%9a%84%e7%b0%a1%e5%96%ae%e6%96%b9%e6%b3%95-%e8%b7%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bf%ae%e6%94%b9%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183316\/","title":{"rendered":"\u5be6\u73fe\u8de8\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da\u7684\u7c21\u55ae\u65b9\u6cd5 (\u8de8\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da)"},"content":{"rendered":"

\u5be6\u73fe\u8de8\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da\u7684\u7c21\u55ae\u65b9\u6cd5<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u4f01\u696d\u7d93\u5e38\u9700\u8981\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u6578\u64da\u7684\u4fee\u6539\u548c\u540c\u6b65\u3002\u9019\u7a2e\u9700\u6c42\u53ef\u80fd\u6e90\u65bc\u591a\u500b\u539f\u56e0\uff0c\u4f8b\u5982\u6578\u64da\u6574\u5408\u3001\u7cfb\u7d71\u5347\u7d1a\u6216\u662f\u696d\u52d9\u64f4\u5c55\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u5be6\u73fe\u8de8\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da\u7684\u7c21\u55ae\u65b9\u6cd5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u7ba1\u7406\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u9019\u4e00\u6311\u6230\u3002<\/p>\n

\u8de8\u6578\u64da\u5eab\u4fee\u6539\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u8de8\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da\u662f\u6307\u5728\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u5c0d\u53e6\u4e00\u500b\u6578\u64da\u5eab\u7684\u6578\u64da\u9032\u884c\u8b80\u53d6\u3001\u4fee\u6539\u6216\u522a\u9664\u64cd\u4f5c\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\uff0c\u4f8b\u5982 MySQL\u3001PostgreSQL\u3001SQL Server \u7b49\u3002\u7531\u65bc\u4e0d\u540c\u7684\u6578\u64da\u5eab\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u7d50\u69cb\u548c\u8a9e\u6cd5\uff0c\u9019\u4f7f\u5f97\u8de8\u6578\u64da\u5eab\u64cd\u4f5c\u8b8a\u5f97\u8907\u96dc\u3002<\/p>\n

\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528\u806f\u63a5\u67e5\u8a62<\/h2>\n

\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u652f\u6301\u8de8\u6578\u64da\u5eab\u7684\u806f\u63a5\u67e5\u8a62\u3002\u9019\u610f\u5473\u8457\u4f60\u53ef\u4ee5\u5728\u4e00\u500b\u67e5\u8a62\u4e2d\u540c\u6642\u8a2a\u554f\u591a\u500b\u6578\u64da\u5eab\u7684\u8868\u3002\u4ee5\u4e0b\u662f MySQL \u7684\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n

UPDATE db1.table1 AS t1\nJOIN db2.table2 AS t2 ON t1.id = t2.id\nSET t1.value = t2.new_value\nWHERE t2.condition = 'some_condition';<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e db2 \u7684 table2 \u4e2d\u7372\u53d6\u6578\u64da\uff0c\u4e26\u6839\u64da\u689d\u4ef6\u66f4\u65b0 db1 \u7684 table1\u3002\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u4e14\u9ad8\u6548\uff0c\u4f46\u9700\u8981\u78ba\u4fdd\u5169\u500b\u6578\u64da\u5eab\u5728\u540c\u4e00\u500b\u4f3a\u670d\u5668\u4e0a\u3002<\/p>\n
\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528\u5b58\u5132\u904e\u7a0b<\/h2>\n
\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u7a2e\u5728\u6578\u64da\u5eab\u4e2d\u9810\u5148\u7de8\u5beb\u7684 SQL \u8a9e\u53e5\u96c6\u5408\uff0c\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u8907\u96dc\u7684\u64cd\u4f5c\u3002\u901a\u904e\u5275\u5efa\u5b58\u5132\u904e\u7a0b\uff0c\u53ef\u4ee5\u5728\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u8abf\u7528\u53e6\u4e00\u500b\u6578\u64da\u5eab\u7684\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 MySQL \u5275\u5efa\u5b58\u5132\u904e\u7a0b\u7684\u793a\u4f8b\uff1a<\/p>\n
DELIMITER \/\/\nCREATE PROCEDURE UpdateData()\nBEGIN\n    UPDATE db1.table1\n    SET value = (SELECT new_value FROM db2.table2 WHERE condition = 'some_condition')\n    WHERE id = (SELECT id FROM db2.table2 WHERE condition = 'some_condition');\nEND \/\/\nDELIMITER ;<\/code><\/pre>\n
\u9019\u6a23\uff0c\u7576\u9700\u8981\u66f4\u65b0\u6578\u64da\u6642\uff0c\u53ea\u9700\u8abf\u7528\u9019\u500b\u5b58\u5132\u904e\u7a0b\u5373\u53ef\uff0c\u5f9e\u800c\u7c21\u5316\u4e86\u64cd\u4f5c\u6d41\u7a0b\u3002<\/p>\n
\u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528 ETL \u5de5\u5177<\/h2>\n
ETL\uff08\u63d0\u53d6\u3001\u8f49\u63db\u3001\u52a0\u8f09\uff09\u5de5\u5177\u53ef\u4ee5\u5e6b\u52a9\u4f01\u696d\u5728\u4e0d\u540c\u6578\u64da\u5eab\u4e4b\u9593\u9032\u884c\u6578\u64da\u7684\u8f49\u79fb\u548c\u4fee\u6539\u3002\u9019\u4e9b\u5de5\u5177\u901a\u5e38\u63d0\u4f9b\u7528\u6236\u53cb\u597d\u7684\u754c\u9762\uff0c\u5141\u8a31\u7528\u6236\u8a2d\u7f6e\u6578\u64da\u6d41\u548c\u8f49\u63db\u898f\u5247\u3002\u5e38\u898b\u7684 ETL \u5de5\u5177\u5305\u62ec Apache Nifi\u3001Talend \u548c Informatica \u7b49\u3002<\/p>\n
\u4f7f\u7528 ETL \u5de5\u5177\u7684\u597d\u8655\u5728\u65bc\uff0c\u5b83\u5011\u80fd\u5920\u8655\u7406\u5927\u91cf\u6578\u64da\u4e26\u81ea\u52d5\u5316\u904e\u7a0b\uff0c\u6e1b\u5c11\u4eba\u5de5\u5e72\u9810\u7684\u9700\u8981\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5b9a\u671f\u540c\u6b65\u6578\u64da\u7684\u4f01\u696d\u4f86\u8aaa\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n
\u65b9\u6cd5\u56db\uff1a\u4f7f\u7528\u61c9\u7528\u7a0b\u5e8f\u5c64\u908f\u8f2f<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u61c9\u7528\u7a0b\u5e8f\u5c64\u9762\u4e0a\u5be6\u73fe\u8de8\u6578\u64da\u5eab\u7684\u6578\u64da\u4fee\u6539\u3002\u9019\u610f\u5473\u8457\u5728\u61c9\u7528\u7a0b\u5e8f\u4e2d\u7de8\u5beb\u908f\u8f2f\uff0c\u901a\u904e\u4e0d\u540c\u7684\u6578\u64da\u5eab\u9023\u63a5\u4f86\u57f7\u884c\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 Python \u7684\u793a\u4f8b\uff1a<\/p>\n
import mysql.connector\n\n# \u9023\u63a5\u5230\u7b2c\u4e00\u500b\u6578\u64da\u5eab\ndb1 = mysql.connector.connect(\n    host=\"localhost\",\n    user=\"user1\",\n    password=\"password1\",\n    database=\"db1\"\n)\n\n# \u9023\u63a5\u5230\u7b2c\u4e8c\u500b\u6578\u64da\u5eab\ndb2 = mysql.connector.connect(\n    host=\"localhost\",\n    user=\"user2\",\n    password=\"password2\",\n    database=\"db2\"\n)\n\ncursor1 = db1.cursor()\ncursor2 = db2.cursor()\n\n# \u5f9e\u7b2c\u4e8c\u500b\u6578\u64da\u5eab\u7372\u53d6\u6578\u64da\ncursor2.execute(\"SELECT new_value FROM table2 WHERE condition = 'some_condition'\")\nnew_value = cursor2.fetchone()[0]\n\n# \u66f4\u65b0\u7b2c\u4e00\u500b\u6578\u64da\u5eab\ncursor1.execute(\"UPDATE table1 SET value = %s WHERE id = %s\", (new_value, some_id))\ndb1.commit()\n\ncursor1.close()\ncursor2.close()\ndb1.close()\ndb2.close();<\/code><\/pre>\n
\u9019\u7a2e\u65b9\u6cd5\u7684\u9748\u6d3b\u6027\u5f88\u9ad8\uff0c\u4f46\u9700\u8981\u958b\u767c\u8005\u5177\u5099\u4e00\u5b9a\u7684\u7de8\u7a0b\u80fd\u529b\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u8de8\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da\u7684\u9700\u6c42\u5728\u73fe\u4ee3\u4f01\u696d\u4e2d\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u806f\u63a5\u67e5\u8a62\u3001\u5b58\u5132\u904e\u7a0b\u3001ETL \u5de5\u5177\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u5c64\u908f\u8f2f\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u3002\u9019\u4e9b\u65b9\u6cd5\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u6e96\u78ba\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f \u4e91\u4f3a\u670d\u5668<\/a> \u9084\u662f \u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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