可以使用什么关键字代替 MODIFY 来修改 MySQL 表的列？

Alter table table_name CHANGE old_columnname1 new_columnname1 datatype, CHANGE old_columnname2 new_columnname2 datatype… CHANGE old_columnnameN new_columnname datatype);

Mysql> Alter table Student CHANGE Rollno Id int, CHANGE City Place Varchar(10);
Query OK, 5 rows affected (0.40 sec)
Records: 5 Duplicates: 0 Warnings: 0

mysql> Alter table Student CHANGE Email Email Varchar(30);
Query OK, 5 rows affected (0.33 sec)
Records: 5 Duplicates: 0 Warnings: 0