mysql 库建表数量有限制吗？
问：mysql 库建表数量有限制吗？
答：无限制
官方文档：
MySQL has no limit on the number of databases. The underlying file system may have a limit on the number of directories.
MySQL has no limit on the number of tables. The underlying file system may have a limit on the number of files that represent tables. Individual storage engines may impose engine-specific constraints. InnoDB permits up to 4 billion tables.
https://dev.mysql.com/doc/refman/5.7/en/database-count-limit.html