问题
I'm fairly new to MySQL. I have a few questions:
1) How many (maximum) no. of columns can be created in a MySQL Table.
2) How many (maximum) no. of tables can be created in a MySQL database.
回答1:
1- Approximately 4,096 columns per table.
2-mySQL has no limit on the number of databases. The underlying file system may have a limit on the number of tables. Individual storage engines may impose engine-specific constraints. InnoDB permits up to 4 billion tables.
回答2:
You can find precise information here :
- Maximum no. of columns
- Maximum no. of tables
In a nutshell:
- 4096 columns per table, 1017 with InnoDB
- No limit on the number of tables, 4 billion with InnoDB
来源：https://stackoverflow.com/questions/15410604/maximum-number-of-columns-in-mysql-table