# MySQL增加列,修改列名、列属性,删除列语句
# 修改表名
alter table test rename test1;
# 添加列
alter table test add column name varchar(10);
# 删除列
alter table test drop column name;
# 修改列类型
alter table test modify address char(10)
||alter table test change address address char(40)
# 修改列名
alter table test change column address address1 varchar(30);