/*(1)查询全部学生的学号、姓名、性别和年龄*/

select student_id, student_name, student_sex,

2016 - year(student_birthday) as student_age

from v_student;

/*(2)查询计算机学院的全部学生的学号，姓名，性别和出生年月日*/

/*sql server代码*/

select student_id, student_name, student_sex,

convert(varchar(10), student_birthday, 111) as student_birth

from v_student;

/*mysql代码*/

select student_id, student_name, student_sex, student_birthday

from v_student;

/*(3)查询教材中含有“教材”的教材信息*/

select *

from v_textbook

where textbook_name like '%教材%';

/*(4)查询在1997年以后出生的计算机学院的学生的学号，姓名，性别和出生年份*/

/*sql server代码*/

select student_id, student_name, student_sex,

datepart(yyyy, student_birthday) as s_birth_year

from v_student

where datepart(yyyy, student_birthday) >= 1997;

/*mysql代码*/

select student_id, student_name, student_sex,

extract(year from student_birthday) as s_birth_year

from v_student

where extract(year from student_birthday) >= 1997;

/*(5)查询年龄不在19到20之间的学生的学号，院系编号和姓名*/

/*sql server代码*/

select student_id, department_id, student_name

from v_student

where 2016 - datepart(yyyy, student_birthday)

not between 19 and 20;

/*mysql代码*/

select student_id, department_id, student_name

from v_student

where 2016 - extract(year from student_birthday)

not between 19 and 20;

/*(6)查询全部学生的学号，姓名，性别，所在院系名称和选课信息*/

select v_student.student_id, student_name, student_sex, department_name, course_name,

course_credit, course_hour

from v_student, v_student_score, v_department, v_course

where v_student.student_id = v_student_score.student_id

and v_student_score.course_id = v_course.course_id

and v_student.department_id = v_department.department_id;

/*(7)查询学生不及格的情况列出不及格学生的学号、姓名和不及格的课程名称*/

select v_student.student_id, student_name, course_name

from v_student, v_course, v_student_score

where grade < 60

and v_student_score.student_id = v_student.student_id

and v_student_score.course_id = v_course.course_id;

/*(8)通过查询为教师生成课程信息，包括：教师院系、教师姓名，任课名称，上课地点以及使用的教材名称*/

select distinct teac.teacher_name, depa.department_name,

cour.course_name, clas.classroom_location, text.textbook_name

from v_teacher

as teac

left join(

select department_name, department_id

from v_department

)

as depa

on(teac.department_id = depa.department_id)

left join(

select course_name, teacher_name

from v_course, v_teacher_course_task, v_teacher, v_department

where v_teacher_course_task.teacher_id = v_teacher.teacher_id

and v_teacher_course_task.course_id = v_course.course_id

)

as cour

on(teac.teacher_name = cour.teacher_name)

left join(

select classroom_location, department_name, teacher_name, course_name

from v_teacher, v_course_develop, v_classroom, v_department, v_course

where v_classroom.classroom_id = v_course_develop.classroom_id

and v_course_develop.teacher_id = v_teacher.teacher_id

and v_teacher.department_id = v_department.department_id

and v_course_develop.course_id = v_course.course_id

)

as clas

on(clas.department_name = depa.department_name

and clas.teacher_name = cour.teacher_name

and clas.course_name = cour.course_name)

left join(

select textbook_name, course_name, teacher_name

from v_textbook, v_textbook_selection, v_teacher_course_task, v_teacher, v_course

where v_textbook.textbook_id = v_textbook_selection.textbook_id

and v_textbook_selection.course_id = v_teacher_course_task.course_id

and v_teacher_course_task.teacher_id = v_teacher.teacher_id

and v_course.course_id = v_teacher_course_task.course_id

)

as text

on(text.course_name = cour.course_name

and text.teacher_name = clas.teacher_name)

;

/*(9)查询没有选修课程名中包含“数据”课程的学生，列出学生的学号和姓名*/

select distinct v_student.student_id, student_name

from v_student

where student_name not in(

select student_name

from v_student, v_course, v_student_score

where v_student.student_id = v_student_score.student_id

and v_course.course_id = v_student_score.course_id

and course_name not in(

select course_name

from v_course

where course_name not like '%数据%'

)

);

/*(10)检索年龄为20岁，同时至少选修了一门学分3分以上的课程的学生的姓名和院系名称*/

select student_name, department_name

from v_student, v_department, v_course, v_student_score

where course_credit >= 3

and (2016 - extract(year from student_birthday)) = 20

and v_student_score.student_id = v_student.student_id

and v_course.course_id = v_student_score.course_id

and v_student.department_id = v_department.department_id;

/*(11)通过信息数据库得到元数据，key_column_usage表描述了具有约束的键列*/

select *

from information_schema.key_column_usage

where referenced_table_name='v_student';

/*(12)将张三的院系编号改为122*/

update v_student

set department_id = '122'

where student_id = '3114005847';

3、运行结果：