insert into student(class_id,name,sex,birthday) values (2,'刘二','女','2001-12-15'); insert into student(class_id,name,sex,birthday) values (3,'王五','男','2003-02-20'); update student set class_id = 1 where name = '张三';
都给提示了这么多红色x了,你鼠标移上去看看不行吗