sql將課程表中所有必修

⑴ 把課程表存進SQL資料庫里，大家有什麼好的想法

課程表（第幾節課，周一，周二，周三···周日）

⑵ SQL命令 「學生」資料庫中有 「學生表」、「課程表」和 「成績表」。 「學生表」中包含學號、姓名

1、首先在電腦上打開資料庫軟體。然後附加有學生表和成績表的資料庫。

⑶ 將學生表、成績表、課程表三張表中的數據作為基礎數據，寫出相關SQL語句，謝謝

--查詢所有學生的成績信息（無成績的學生也需顯示）
SELECTSname,Cname,Grade
.Sno=SC.Sno
LEFTJOINCourseONCourse.Cno=SC.Cno
--查詢8002課程的平均分、最高分以及課程名稱，且平均分保留2位小數
SELECTCAST(AVG(Grade)ASNUMERIC(5,2))平均分,MAX(Grade)最高分,Cname課程名稱
FROMCoruseJOINSCONCourse.Cno=SC.Cno
WHERECourse.Cno='8002'

⑷ 請問在SQL語句中，實現選課表中的課程號與課程表中的課程號建立關聯，這樣建立對嗎

前提： 選課表中的課程號欄位已設置為主鍵
--在創建表時語句同樓上

--新增欄位並加上外鍵約束
ALTER TABLE 課程 add cno varchar(20) NOT NULL
constraint 選課_Fore FOREIGN KEY REFERENCES 選課(課程號)

--給現有欄位添加外鍵約束
ALTER TABLE 課程
add constraint 選課_Fore FOREIGN KEY (課程號) REFERENCES 選課(課程號)

⑸ 從學生表、選課表、課程表，試用SQL語句表示下列查詢語句： （1）列出全部學生的信息。

1.

SELECT*
FROM學生表

2.

SELECT學號,姓名
FROM學生表
WHERE專業內='軟體測試專業'

3.

SELECT	課程號
FROM	課程表
WHERE	類容型='必修課'

⑹ sql 中刪除選課表記錄，將學名為102，課程號為102的記錄刪除

delete from 選課表 where 學名='102' and 課程號='102';

⑺ SQL語句的一道題 三個基本表：學生表(Student)、課程表（Course）、學生選課表（SC）

1. select * from SC
2. select Sname，Sage from Student where Sdept = '計算機'
3. select Sno,Cno,Grade from SC where Grade >= 70 and Grade <= 80
4. select Sname,Sage from Student where Sage between 18 and 20 and Ssex = '男'
5. select top 1 Grade from SC where Cno = 'C01'
6. select max(Sage),min(Sage) from Student
7. select Sdept,sum(Sno) from Student group by Sdept
8. select course.Cname,sum(sc.Sno),max(Grade) from SC
join studet on Student.Sno = SC.Sno
join Course on Course.Cno = SC.Cno
group by course.cname,max(grade)

9. select sum(Cno),avg(Grade) from SC
join Course on Course.Cno = SC.Cno
join Student on Student.Sno= SC.Sno
order by SC.Sno

10. select Stuent.Sno，Stuent.Sname，sum(Grade) A from SC
join Student on Student.Sno = SC.Sno
group by sc.Sno,student.Sname
having A > 200

11. select Student.Sname,Student.Sdept from Student
join Course on Course.Cno = SC.Cno
join SC on SC.Sno = Student.Sno
where SC.Cno = 'C02'

12. select Student.sname,course.cno,sc.grade from sc
join student on student.sno = sc.sno
join course on course.cno = sc.cno
where sc.grade >= 80
order by sc.grade desc

13. select cno,cname from
(
select course.cno,course.cname,sun(sno) from student
join course on course.cno = sc.cno
join sc on sc.sno = student.sno
group by cno,cname
having sun(sno) > 0
)

14. ① select student.sname,student.sdept from
(
select student.sname,student.sdept,course.cname from student
join sc on sc.sno = student.sno
join course on course.cno = sc.cno
where course.cname = 'C01'
)

② select student.sno,student.sname from
(
select student.sno,student.sname,student.sdept,sc.grade from sc
join student on student.sno = sc,sno
where student.sdept = '信息' and sc.grade >= 80
)

③ select top 1 student.sname from
(
select student.sname,student.sdept,sum(sc.grade) from sc
join student on student.sno = sc.sno
where student.sdept = '計算機'
group by student.sname,student.sdept
order by
)

15. delete from sc where grade < 50
16. update sc set grade += 5 from sc
join course on course.cno = sc.cn
join student on student.sno = sc.sno
where student.sno =
(
select student.sno from sc
join course on course.cno = sc.cno
where course.cname = 'c01'
)

17. update sc set grade += 10 from sc
join student on student.sno = sc.sno
where student.sno =
(
select student.sno from student
join sc on sc.sno = student.sno
join course on course.cno = sc.cno
where student.sdept = '計算機' and course.cname = '計算機文化基礎'
)

18. create view [A] as
select student.sno,student.sname,student.sdept,course.cno,course.cname,sc.grade from sc
join student on student.sno = sc.sno
join course on course.cno = sc.cno

19. create view [A] as
select student.sno,avg(sc.grade) from sc
join student on student.sno = sc.sno
group by student.sno

20. create view [A] as
select student.sno,sum(sc.grade) from sc
join student on student.sno = sc.sno
group by student.sno

21. create index A on student(sname)
22. 不會

⑻ 在sql資料庫中所授課程表與新增所授課程表的關系

第一個表是學生表Student，包含三個欄位，學生id（stu_id） 和 學生姓名（stu_name）和課程id（les_id）
Create Table [dbo].Student(
stu_id [uniqueidentifier] NOT NULL,
stu_name [nvarchar](425) NOT NULL,
les_id [uniqueidentifier] NOT NULL
)
第二個表課程表Lesson，兩個欄位，課程id（les_id）和課程名稱（les_name）
Create Table [dbo].Lesson(
les_id [uniqueidentifier] NOT NULL,
les_name [nvarchar](425) NOT NULL
)
第三個表學生成績表Score,三個欄位課程id（les_id），學生id（stu_id）和課程得分（les_score）
Create Table [dbo].Score(
les_id [uniqueidentifier] NOT NULL,
stu_id [uniqueidentifier] NOT NULL,
les_score [int] NOT NULL
)

⑼ 怎麼用SQL_UPDATE命令將課程表中課程名為計算機基礎的學時修改為4。

update 課程表 set 學時=4 where 課程名='計算機基礎'

⑽ 怎麼用sql語句查詢課程表中的最高課時以及課程名稱

select top 1 課時, 課程名稱 from 課程表
order by 課時 desc