{"id":75416,"date":"2024-10-15T23:37:18","date_gmt":"2024-10-15T15:37:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75416\/"},"modified":"2024-10-15T23:37:18","modified_gmt":"2024-10-15T15:37:18","slug":"mysql-%e4%ba%82%e7%a2%bc%e8%a7%a3%e6%b1%ba%e7%9a%84%e5%85%a9%e5%a4%a7%e6%96%b9%e6%a1%88%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75416\/","title":{"rendered":"MySQL \u4e82\u78bc\u89e3\u6c7a\u7684\u5169\u5927\u65b9\u6848\u4ecb\u7d39"},"content":{"rendered":"

MySQL \u4e82\u78bc\u89e3\u6c7a\u7684\u5169\u5927\u65b9\u6848\u4ecb\u7d39<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMySQL \u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7136\u800c\uff0c\u4f7f\u7528 MySQL \u6642\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u4e82\u78bc\u554f\u984c\uff0c\u9019\u4e0d\u50c5\u5f71\u97ff\u6578\u64da\u7684\u53ef\u8b80\u6027\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u640d\u58de\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5169\u7a2e\u89e3\u6c7a MySQL \u4e82\u78bc\u554f\u984c\u7684\u4e3b\u8981\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u8655\u7406\u9019\u4e00\u6311\u6230\u3002<\/p>\n

\u65b9\u6848\u4e00\uff1a\u6b63\u78ba\u8a2d\u7f6e\u5b57\u7b26\u96c6<\/h2>\n

\u5b57\u7b26\u96c6\u7684\u8a2d\u7f6e\u662f\u89e3\u6c7a MySQL \u4e82\u78bc\u554f\u984c\u7684\u9996\u8981\u6b65\u9a5f\u3002MySQL \u652f\u6301\u591a\u7a2e\u5b57\u7b26\u96c6\uff0c\u5305\u62ec UTF-8\u3001latin1 \u7b49\u3002\u9078\u64c7\u5408\u9069\u7684\u5b57\u7b26\u96c6\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u6b63\u78ba\u5b58\u5132\u548c\u6aa2\u7d22\u3002<\/p>\n

1. \u8a2d\u7f6e\u6578\u64da\u5eab\u5b57\u7b26\u96c6<\/h3>\n

\u5728\u5275\u5efa\u6578\u64da\u5eab\u6642\uff0c\u53ef\u4ee5\u6307\u5b9a\u5b57\u7b26\u96c6\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u5275\u5efa\u4e00\u500b\u652f\u6301 UTF-8 \u7684\u6578\u64da\u5eab\uff1a<\/p>\n

CREATE DATABASE my_database CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;<\/code><\/pre>\n
\u9019\u88e1\uff0cutf8mb4 \u662f UTF-8 \u7684\u4e00\u500b\u64f4\u5c55\u7248\u672c\uff0c\u652f\u6301\u66f4\u591a\u7684\u5b57\u7b26\uff0c\u5305\u62ec Emoji\u3002<\/p>\n
2. \u8a2d\u7f6e\u8868\u548c\u5217\u7684\u5b57\u7b26\u96c6<\/h3>\n
\u5728\u5275\u5efa\u8868\u6642\uff0c\u4e5f\u9700\u8981\u6307\u5b9a\u5b57\u7b26\u96c6\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE TABLE my_table (\n    id INT PRIMARY KEY,\n    name VARCHAR(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci\n);<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u8868\u4e2d\u7684\u6bcf\u4e00\u5217\u90fd\u80fd\u6b63\u78ba\u8655\u7406 UTF-8 \u5b57\u7b26\u3002<\/p>\n
3. \u8a2d\u7f6e\u9023\u63a5\u5b57\u7b26\u96c6<\/h3>\n
\u5728\u61c9\u7528\u7a0b\u5e8f\u8207 MySQL \u4e4b\u9593\u7684\u9023\u63a5\u4e2d\uff0c\u5fc5\u9808\u78ba\u4fdd\u4f7f\u7528\u6b63\u78ba\u7684\u5b57\u7b26\u96c6\u3002\u53ef\u4ee5\u5728\u9023\u63a5\u5b57\u7b26\u4e32\u4e2d\u6307\u5b9a\u5b57\u7b26\u96c6\uff0c\u4f8b\u5982\uff1a<\/p>\n
jdbc:mysql:\/\/localhost:3306\/my_database?useUnicode=true&characterEncoding=utf8mb4<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5f9e\u61c9\u7528\u7a0b\u5e8f\u767c\u9001\u5230 MySQL \u7684\u6578\u64da\u4e0d\u6703\u51fa\u73fe\u4e82\u78bc\u3002<\/p>\n
\u65b9\u6848\u4e8c\uff1a\u6578\u64da\u8f49\u63db<\/h2>\n
\u5982\u679c\u6578\u64da\u5df2\u7d93\u5b58\u5132\u70ba\u4e82\u78bc\uff0c\u5247\u9700\u8981\u9032\u884c\u6578\u64da\u8f49\u63db\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u5c07\u6578\u64da\u5f9e\u4e00\u7a2e\u5b57\u7b26\u96c6\u8f49\u63db\u70ba\u53e6\u4e00\u7a2e\u5b57\u7b26\u96c6\u3002<\/p>\n
1. \u4f7f\u7528 CONVERT \u51fd\u6578<\/h3>\n
MySQL \u63d0\u4f9b\u4e86 CONVERT \u51fd\u6578\uff0c\u53ef\u4ee5\u7528\u4f86\u8f49\u63db\u5b57\u7b26\u96c6\u3002\u4f8b\u5982\uff0c\u5c07\u4e00\u500b\u5217\u7684\u6578\u64da\u5f9e latin1 \u8f49\u63db\u70ba utf8mb4\uff1a<\/p>\n
UPDATE my_table SET name = CONVERT(CAST(CONVERT(name USING latin1) AS BINARY) USING utf8mb4);<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u5c07\u5df2\u7d93\u5b58\u5132\u70ba\u4e82\u78bc\u7684\u6578\u64da\u8f49\u63db\u70ba\u6b63\u78ba\u7684\u5b57\u7b26\u96c6\u3002<\/p>\n
2. \u4f7f\u7528\u5916\u90e8\u5de5\u5177<\/h3>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u5916\u90e8\u5de5\u5177\u9032\u884c\u6578\u64da\u8f49\u63db\u53ef\u80fd\u66f4\u70ba\u65b9\u4fbf\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 Python \u7684 pandas \u5eab\u4f86\u8b80\u53d6\u6578\u64da\uff0c\u7136\u5f8c\u5c07\u5176\u8f49\u63db\u70ba\u6b63\u78ba\u7684\u5b57\u7b26\u96c6\uff0c\u6700\u5f8c\u518d\u5beb\u56de MySQL\u3002<\/p>\n
import pandas as pd\nimport mysql.connector\n\n# \u9023\u63a5\u5230 MySQL\nconn = mysql.connector.connect(user='user', password='password', host='localhost', database='my_database')\ndf = pd.read_sql('SELECT * FROM my_table', conn)\n\n# \u8f49\u63db\u5b57\u7b26\u96c6\ndf['name'] = df['name'].str.encode('latin1').str.decode('utf8mb4')\n\n# \u5beb\u56de MySQL\ndf.to_sql('my_table', conn, if_exists='replace', index=False)<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u89e3\u6c7a MySQL \u4e82\u78bc\u554f\u984c\u7684\u95dc\u9375\u5728\u65bc\u6b63\u78ba\u8a2d\u7f6e\u5b57\u7b26\u96c6\u548c\u9032\u884c\u5fc5\u8981\u7684\u6578\u64da\u8f49\u63db\u3002\u901a\u904e\u4e0a\u8ff0\u5169\u5927\u65b9\u6848\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u8655\u7406\u4e82\u78bc\u554f\u984c\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u53ef\u8b80\u6027\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u660e\u667a\u4e4b\u8209\uff0c\u9019\u6a23\u53ef\u4ee5\u5728\u4fdd\u969c\u6578\u64da\u5b89\u5168\u7684\u540c\u6642\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MySQL\u4e82\u78bc\u554f\u984c\u7684\u5169\u5927\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u6709\u6548\u8655\u7406\u6578\u64da\u986f\u793a\u7570\u5e38\uff0c\u63d0\u5347\u6578\u64da\u5eab\u4f7f\u7528\u9ad4\u9a57\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-75416","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75416","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=75416"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75416\/revisions"}],"predecessor-version":[{"id":75417,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75416\/revisions\/75417"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75416"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75416"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}