1.sql第2部分
1.创建类表
%ign%ignore_a_1%re_pre_1%2.创建教师表
create table teacher ( teacher_id int primary key, teacher_name varchar(100), age int, subject varchar(50), experience int);
3.将教师数据插入表
insert into teacher(teacher_id,teacher_name,age,subject,experience)values(101, 'sk. sohana', 30, 'mathematics', 5),(102, 'u. munisekhar', 35, 'english', 8),(103, 'sk. nellu', 40, 'science', 10),(104, 'a. venu', 28, 'history', 3);
4.将类数据插入表
insert into class(class_id,class_name,teacher_id)(9, 'math', 101),(10, 'english', 102),(11, 'science', 103),(12, 'history', 104);
教师桌
101sk. sohana30mathematics5102u. munisekhar35english8103sk. nellu40science10104a. venu28history3105s. jagadeesh28telugu3
类表
9math10110english10211science10312history104从class表中获取数据
select * from class;
| class_id | class_name | teacher_id ||----------|--------------------|------------|| 9 | math | 101 || 10 | english | 102 || 11 | science | 103 || 12 | history | 104 |
从教师表中获取数据 5年经验教师
select * from teacher whare experience >5
| teacher_id | teacher_name | age | subject | experience ||------------|--------------------|-----|---------------|------------|| 102 | u. munisekhar | 35 | english | 8 || 103 | sk. nellu | 40 | science | 10 |
7.查找munisekhar老师详细信息
select * from teacher where teacher_name='u. munisekhar'
| teacher_id | teacher_name | age | subject | experience ||------------|--------------------|-----|---------------|------------|| 102 | u. munisekhar | 35 | english | 8 |
8.找到 sk. sohana老师的经验？
Levity
AI帮你自动化日常任务
206 查看详情 
select experience from teacher where teacher_name='sk. sohana';
| experience ||------------|| 8 |
9.查找老师的姓名和年龄，其中年龄为 29 至 39
select name,age from teacher where age between 29 and 39;
| teacher_name | age ||--------------------|-----|| sk. sohana | 30 | | u. munisekhar | 35 |
10.查找班级名称和老师姓名以使用左连接
select class.class_name, teacher.teacher_namefrom classright join teacher on class.teacher_id=teacher.teacher_id;
| class_name | teacher_name ||------------|--------------------|| math | sk. sohana || english | u. munisekhar || science | sk. nellu || history | a. venu |
11.查找班级名称和所有教师姓名以使用右连接
select class.class_name, teacher.teacher_namefrom classright join teacher on class.teacher_id=teacher.teacher_id;
| class_name | teacher_name ||------------|--------------------|| math | sk. sohana || english | u. munisekhar || science | sk. nellu || history | a. venu || null | s. jagadeesh |
12.查找班级名称和教师姓名以使用内连接
select class.class_name, teacher.teacher_namefrom classinner join teacher on class.teacher_id=teacher.teacher_id;
| class_name | teacher_name ||------------|--------------------|| math | sk. sohana || english | u. munisekhar || science | sk. nellu || history | a. venu |
13.查找munisekhar班级显示他的姓名和班级
select teacher.teacher.name, class.class_namefrom teacher right join class on teacher.teacher_id=class.teacher_idwhere teacher.teacher_name = 'u. munisekhar';
| teacher_name | class_name ||--------------------|------------|| U. Munisekhar | English |
以上就是SQL || MySQL ||作者：穆尼塞卡·乌达瓦拉帕蒂的详细内容，更多请关注创想鸟其它相关文章！
版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。
如发现本站有涉嫌抄袭侵权/违法违规的内容， 请发送邮件至 chuangxiangniao@163.com 举报，一经查实，本站将立刻删除。
发布者：程序猿，转转请注明出处：https://www.chuangxiangniao.com/p/741148.html
微信扫一扫 
支付宝扫一扫 
