MySQL修改表的实际操作与应用
改表复制alter table table_name add column column_name type default value; 1.
改表复制alter table table_name add column column_name type default value; 1.
改表复制alter table table_name add column column_name type default value; 1.
改表复制alter table table_name add column column_name type default value; 1.