mysql 中的最佳实践？

Question

我需要在 mysql 中存储某些内容的历史数据（仅过去 7 天） - 我应该为每个额外的列创建一个额外的列还是可以接受的方式是什么？

Answer 1

if you want to store historical data for last 7 days only,
add a date-time column to store the record creation time-stamp,
and setup a cronjob to periodically remove the records which old than 7 days

if you are using file-based data (csv),
make sure categories data into different date,
and each file contains a single date,
use the find command to remove (I assume you are using linux)

find -type f -mtime 7 -xargs rm {} \;

Answer 2

如果我理解正确，您应该使用列（数据、日期）创建表历史记录。