mysql 学生表 单表增删改查（模糊，倒叙）

mysql 学生表 单表增删改查（模糊，倒叙）

#查整个表
select * from student

#查sid为02的学生
select * from student where Sid = 02

#修改sid为02学生的性别为女，名字为人才
update student set Ssex = "女",Sname="人才" where Sid = 02

#删除sid为02学生
delete from student where Sid = 02

#新增02、周树人、1990-05-20 00:00:00、男学生
insert into student values("02","周树人","1990-05-20 00:00:00","男")

#按照Sid来倒叙 去掉desc就是正序
select * from student order by Sid desc

#查询姓周的学生 包含"%周%" 结尾 "%周"
select * from student where Sname like "周%"

#查询不姓周的学生
select * from student where Sname not like "周%"

#查询所有学生年龄(只算到了年份)
select Sname,year(now())-year(Sage) from student

总sql语句

#查整个表
select * from student

#查sid为02的学生
select * from student where Sid = 02

#修改sid为02学生的性别为女，名字为人才
update student set Ssex = "女",Sname="人才" where Sid = 02


#删除sid为02学生
delete from student where Sid = 02

#第四步新增02、周树人、1990-05-20 00:00:00、男学生

insert into student values("02","周树人","1990-05-20 00:00:00","男")

#按照Sid来倒叙
select * from student order by Sid desc

#查询姓周的学生 包含"%周%" 结尾 "%周"
select * from student where Sname like "周%"


#查询不姓周的学生
select * from student where Sname not like "周%"


#查询所有学生年龄(只算到了年份)
select Sname,year(now())-year(Sage) from student