在MYSQL 6.2 Workbench中，项目是否可以记录在1个表中，但是可以存储在另一个表（查找表）中？

I am designing a MySQL 6.0 database for a system like a forum. In this system, users can add keywords to 'tag' their posts and comments. Can this be done?

Yes. You can do what you want with triggers, or with application logic in whatever language you are using for your middle Tier