python
在python文件开始处加上: # -*- coding:utf8 -*-
MySQLdb的连接语句为: conn=MySQLdb.connect(host='localhost',user='root',passwd='1991618',db='wanfang',port=3306,charset='utf8')
notepad++的格式设置为: 以UTF-8无BOM编码
MySQL String Types: Storage, Performance, and Best PracticesMay 10, 2025 am 12:02 AMMySQLstringtypesimpactstorageandperformanceasfollows:1)CHARisfixed-length,alwaysusingthesamestoragespace,whichcanbefasterbutlessspace-efficient.2)VARCHARisvariable-length,morespace-efficientbutpotentiallyslower.3)TEXTisforlargetext,storedoutsiderows,
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MySQL: What length should I use for VARCHARs?May 09, 2025 am 12:06 AMThe best MySQLVARCHAR column length selection should be based on data analysis, consider future growth, evaluate performance impacts, and character set requirements. 1) Analyze the data to determine typical lengths; 2) Reserve future expansion space; 3) Pay attention to the impact of large lengths on performance; 4) Consider the impact of character sets on storage. Through these steps, the efficiency and scalability of the database can be optimized.
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