alter用来增加或者减少列,alter stuednt add name vachar2(30); update用来更改表中的数据:update student set sutudent.name ='张三'; 相关文章: 2022-12-23 2022-12-23 2022-12-23 2022-12-23 2021-08-04 2021-07-15 2021-06-25 2021-12-12