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  • DML操纵语句

    --在新增数据的时候,如果在表名之后没有跟 列名,那么values()必须写全
    --顺序必须不能改变,这个顺序就是表中列的顺序
    insert into dept
    values(70,'20','哈哈')
    insert into dept(deptno,dname)
    values(70,'20')
    --查询所有教师
    select * from teacher
    --修改姓马的教师部门编号为10
    update teacher set deptno=10 where tname like '马%'
    --查询所有姓马的老师信息
    select tname,deptno from teacher where tname like '马%'


    --查询陈老师和韩老师的薪水
    select tname,sal from teacher where tname like '陈%' or tname like '韩%'
    --给所有叫陈老师和韩老师加薪2000
    update teacher set sal=sal+2000 where tname like '陈%' or tname like '韩%'


    --查询所有姓赵的老师
    select * from teacher where tname like '赵%'
    --删除所有姓赵的老师
    delete from teacher where tname like '赵%'

    --删除所有教师和部门
    delete from teacher
    delete from dept
    --删除教师和部门表
    drop table teacher
    drop table dept

     (以上内容来自王硕老师)

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  • 原文地址:https://www.cnblogs.com/liu-chao-feng/p/5890318.html
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