--insert into添加数据 insert into student(sno,sname,ssex) values(‘110‘,‘王军‘,‘男‘); --提交事物 commit; --回滚事物 --rollback; insert into teacher1 select * from teacher; insert into teacher1(ton,tname,prof) select ton,tname,prof from teacher; --选择性插入两表之间 insert into teacher1 t(ton,tname,prof) select ton,tname,prof from teacher where ton=‘804‘; --修改 update update student set sclass=‘95031‘,ssex=‘女‘ where son=‘104‘; commit --修改成绩 update score set degree=degree+1; --将空sclass内容更改95033 update student set sclass=‘95033‘ where sclass is null; --删除 delete delete from student where sno=‘104‘; --全表快速清空:先删表,在建表 truncate table stdent;
时间: 2024-10-05 13:39:12