mysql 初学者必学语句整理_MySQL
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MySQL 添加列，修改列，删除列 ALTER TABLE：添加，修改，删除表的列，约束等表的定义。
查看列：desc 表名；
修改表名：alter table old _name rename to new_name;
添加列：alter table 表名 add column 列名 varchar（100）；
删除列：alter table 表名 drop column 列名；
修改列名：alter table 表名 change old_name new_name 字符类型；
修改列属性：alter table 表名 modify 列名 varchar（10）；
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