160 阿裏雲技術社區[雲棲]

SQL 經典五十道題

--1.學生表
Student(S,Sname,Sage,Ssex) --S 學生編號,Sname 學生姓名,Sage 出生年月,Ssex 學生性別
--2.課程表
Course(C,Cname,T) --C --課程編號,Cname 課程名稱,T 教師編號
--3.教師表
Teacher(T,Tname) --T 教師編號,Tname 教師姓名
--4.成績表
SC(S,C,score) --S 學生編號,C 課程編號,score 分數
*/
--創建測試數據

create table Student(S varchar(10),Sname varchar(10),Sage datetime,Ssex nvarchar(10))
insert into Student values('01' , '趙雷' , '1990-01-01' , '男')
insert into Student values('02' , '錢電' , '1990-12-21' , '男')
insert into Student values('03' , '孫風' , '1990-05-20' , '男')
insert into Student values('04' , '李雲' , '1990-08-06' , '男')
insert into Student values('05' , '周梅' , '1991-12-01' , '女')
insert into Student values('06' , '吳蘭' , '1992-03-01' , '女')
insert into Student values('07' , '鄭竹' , '1989-07-01' , '女')
insert into Student values('08' , '王菊' , '1990-01-20' , '女')
create table Course(C varchar(10),Cname,varchar(10),T varchar(10))
insert into Course values('01' , '語文' , '02')
insert into Course values('02' , '數學' , '01')
insert into Course values('03' , '英語' , '03')
create table Teacher(T varchar(10),Tname,varchar(10))
insert into Teacher values('01' , '張三')
insert into Teacher values('02' , '李四')
insert into Teacher values('03' , '王五')
create table SC(S varchar(10),C varchar(10),score decimal(18,1))
insert into SC values('01' , '01' , 80)
insert into SC values('01' , '02' , 90)
insert into SC values('01' , '03' , 99)
insert into SC values('02' , '01' , 70)
insert into SC values('02' , '02' , 60)
insert into SC values('02' , '03' , 80)
insert into SC values('03' , '01' , 80)
insert into SC values('03' , '02' , 80)
insert into SC values('03' , '03' , 80)
insert into SC values('04' , '01' , 50)
insert into SC values('04' , '02' , 30)
insert into SC values('04' , '03' , 20)
insert into SC values('05' , '01' , 76)
insert into SC values('05' , '02' , 87)
insert into SC values('06' , '01' , 31)
insert into SC values('06' , '03' , 34)
insert into SC values('07' , '02' , 89)
insert into SC values('07' , '03' , 98)

--1、查詢"01"課程比"02"課程成績高的學生的信息及課程分數

SELECT a. ,c. 
from 
(select 
    a.* 
    from
(SELECT * from sc WHERE sc.C in('01'))a
left JOIN(SELECT * from sc where sc.C in('02'))b
ON a.s =b.s 
where a.score>b.score ) a ,student c
where a.s =c.s;

--2、查詢"01"課程比"02"課程成績低的學生的信息及課程分數

SELECT a. ,c.
FROM
(SELECT a.*
FROM
(SELECT * FROM sc WHERE sc.C in('01'))a
LEFT JOIN(SELECT * FROM sc WHERE sc.C in('02'))b
ON a.s =b.s WHERE a.score<b.score) a,student c
WHERE a.s =c.s

--3、查詢平均成績大於等於60分的同學的學生編號和學生姓名和平均成績

SELECT
b.s
,c.Sname
,b.avgscore
FROM
(SELECT 
    a.s s
    , avg(a.score) avgscore
FROM sc a
GROUP BY a.s) b
    ,student c
WHERE
b.avgscore>60 AND c.s =b.s

--4、查詢平均成績小於60分的同學的學生編號和學生姓名和平均成績

SELECT
b.s
,c.Sname
,b.avgscore
FROM
(SELECT 
    a.s s
    , avg(a.score) avgscore
FROM sc a
GROUP BY a.s) b
    ,student c
WHERE
b.avgscore<60 AND c.s =b.s

--5、查詢所有同學的學生編號、學生姓名、選課總數、所有課程的總成績

SELECT
    b.s
    ,c.Sname
    ,b.num
    ,b.sumscore
    FROM
(SELECT
    a.s s
    ,COUNT(a.c) num 
    ,SUM(a.score) sumscore
FROM 
    sc a
GROUP BY a.s) b
    ,student c
WHERE b.s =c.s

--6、查詢"李"姓老師的數量

SELECT
COUNT(a.Tname)
FROM
(SELECT
    Tname Tname
FROM
    teacher
    WHERE
    Tname LIKE '李%') a

--7、查詢學過"張三"老師授課的同學的信息

SELECT
d.*
FROM
student d
,sc e
WHERE
e.S =d.S
AND
e.C=
(SELECT
    b.C
FROM
    teacher a
    ,course b
WHERE
    a.T =b.T AND a.Tname='張三')

--8、查詢沒學過"張三"老師授課的同學的信息

SELECT
a.*
FROM
student a
WHERE
a.S NOT in 
(SELECT 
 b.S
FROM
sc a
,student b

WHERE
a.S=b.S AND
a.C =
(SELECT
    b.c 
FROM
    teacher a
    ,course b
WHERE
    a.T =b.T AND a.Tname ='張三'))

--9、查詢學過編號為"01"並且也學過編號為"02"的課程的同學的信息

SELECT
*
FROM 
sc a,
sc b,
student c
WHERE
a.S =b.S AND a.C='01' and b.C='02'  
AND c.S =a.S

--10、查詢學過編號為"01"但是沒有學過編號為"02"的課程的同學的信息

SELECT
*
FROM
student a
WHERE
a.S in
(
SELECT
DISTINCT(sc.s)
FROM
sc
WHERE
sc.S
NOT
in(
SELECT S
FROM sc
WHERE
 sc.C in('02')
GROUP BY
sc.S)
)

--11、查詢沒有學全所有課程的同學的信息

SELECT
b.*
FROM
student b
WHERE
b.S in
(
SELECT
a.s
FROM
(SELECT
    a.S s
    ,COUNT(a.C) NUM
FROM
sc a
GROUP BY
a.s) a
WHERE
a.NUM<3
)

--12、查詢至少有一門課與學號為"01"的同學所學相同的同學的信息

SELECT
e.*
FROM
student e
WHERE
e.S in 
(SELECT
DISTINCT(c.s)
FROM
student c
,sc d
WHERE
c.s=d.s
AND 
d.C in 
(SELECT 
b.c
FROM 
student a
,sc  b
WHERE
a.s =b.s AND a.s ='01'
)
)

--13、查詢和"01"號的同學學習的課程完全相同的其他同學的信息

SELECT
    a.c
FROM
    sc a    
WHERE
    a.S ='01'                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

---

SELECT
*
FROM
(SELECT
a.*
,COUNT(b.c) num
FROM
student a
,sc b
WHERE
a.s=b.S 
GROUP BY
b.S
) a
WHERE
a.num=3 AND a.s <> '01'

--14、查詢沒學過"張三"老師講授的任一門課程的學生姓名

SELECT
*
FROM
student a
WHERE
a.S NOT in 
(
SELECT
b.S
FROM
(
SELECT
b.c 
,b.Cname
FROM
teacher a
,course b
WHERE
a.T=b.T
AND
a.Tname='張三'
) a
,sc b
WHERE
a.c=b.C
)

--15、查詢兩門及其以上不及格課程的同學的學號，姓名及其平均成績

SELECT
b.S
,b.Sname
,a.avgscore
FROM
(SELECT
AVG(score) avgscore
,s S
FROM
sc
WHERE
sc.score<60
GROUP BY
s
HAVING COUNT(s)>=2) a
,student b
WHERE
a.S=b.S

--16、檢索"01"課程分數小於60，按分數降序排列的學生信息

SELECT
b.*
FROM
(SELECT
a.s s
FROM
sc a
WHERE
a.C ='01'
AND
a.score<60
ORDER BY a.score DESC
) a
,student b
WHERE
a.s=b.S

--17、按平均成績從高到低顯示所有學生的所有課程的成績以及平均成績

SELECT
*
FROM
(SELECT
b.S
,b.C
,b.score
,c.avgscore
FROM
sc b
LEFT JOIN
(SELECT
a.S
,AVG(a.score) avgscore
FROM
sc a
GROUP BY a.S) c
ON c.S =b.S) a
,student b
WHERE
a.S =b.S
ORDER BY avgscore DESC

--18、查詢各科成績最高分、最低分和平均分：以如下形式顯示：課程ID，課程name，最高分，最低分，平均分，及格率，中等率，優良率，優秀率
--及格為>=60，中等為：70-80，優良為：80-90，優秀為：>=90

SELECT
a.C
,b.Cname
,MAX(a.score)
,MIN(a.score)
,AVG(a.score)
,(SELECT COUNT(1) FROM sc WHERE sc.C=b.C and score>60)/(SELECT COUNT(1)FROM sc WHERE sc.C=b.c ) jigelv
FROM sc a ,course b 
WHERE a.C =b.C
GROUP BY
a.C

SELECT
a.C
,a.Cname
,MAX(b.score)
,MIN(b.score)
,CAST(AVG(b.score) AS DECIMAL(18,2)) pingqunfen
,CAST((SELECT COUNT(1) FROM sc WHERE sc.C=a.C AND sc.score>60)/
(SELECT COUNT(1) FROM sc WHERE sc.C =a.C) AS DECIMAL(18,2)) jigelv
,CAST((SELECT COUNT(1) FROM sc WHERE sc.C =a.c AND sc.score>=70 AND sc.score<80)/
(SELECT COUNT(1) FROM sc WHERE sc.c =a.c) AS DECIMAL (18,2)) youlianlv
FROM
course a,sc b
WHERE
a.C=b.C
GROUP BY a.C,a.Cname
ORDER BY a.C DESC

--19、按各科成績進行排序，並顯示排名

SELECT 
c.s
,c.sname
,b.cname
,a.score
,(SELECT COUNT(1) FROM sc WHERE sc.C=a.c AND sc.score > a.score)+1 mc
FROM 
sc a ,course b,student c 
WHERE a.c='01'
AND a.c=b.c 
AND a.s=c.s
ORDER BY mc

SELECT 
c.s
,c.sname
,b.cname
,a.score
,(SELECT COUNT(1) FROM sc WHERE sc.C=a.c AND sc.score > a.score)+1 mc
FROM 
sc a ,course b,student c 
WHERE a.c='02'
AND a.c=b.c 
AND a.s=c.s
ORDER BY mc

SELECT 
c.s
,c.sname
,b.cname
,a.score
,(SELECT COUNT(1) FROM sc WHERE sc.C=a.c AND sc.score > a.score)+1 mc
FROM 
sc a ,course b,student c 
WHERE a.c='03'
AND a.c=b.c 
AND a.s=c.s
ORDER BY mc

--20、查詢學生的總成績並進行排名

SELECT 
b.s
,b.sumscore
,@rownum:=@rownum +1 AS rownum
FROM
(SELECT
a.s s
,SUM(a.score) sumscore
FROM
sc a
GROUP BY
a.S
ORDER BY sumscore DESC
) as b
,(SELECT @rownum:=0)r

--21、查詢不同老師所教不同課程平均分從高到低顯示

SELECT
c.Tname
,b.Cname
,AVG(a.score) 
FROM
sc a
,course b
,teacher c
WHERE
a.C =b.C
AND b.T =c.T
GROUP BY a.C
ORDER BY AVG(a.score) DESC

--22、查詢所有課程的成績第2名到第3名的學生信息及該課程成績

SELECT
a.*
,b.*
FROM
(SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='01'AND a.score>b.score)+1 mc
FROM sc b  WHERE b.c='01' HAVING mc BETWEEN 2 AND 3
UNION ALL
SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='02'AND a.score>b.score)+1 mc
FROM sc b  WHERE b.c='02' HAVING mc BETWEEN 2 AND 3
UNION ALL
SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='03'AND a.score>b.score)+1 mc
FROM sc b  WHERE b.c='03' HAVING mc BETWEEN 2 AND 3
) a
,student b
WHERE
a.s =b.s

--23、統計各科成績各分數段人數：課程編號,課程名稱,[100-85],[85-70],[70-60],[0-60]及所占百分比

SELECT
a.*
FROM
(SELECT
c.Cname
,(SELECT COUNT(*)FROM sc a WHERE a.score>85 AND a.C=b.c AND c.c=a.C AND  a.C='01') '85以上'
,(SELECT COUNT(*)FROM sc a WHERE a.score<85 AND a.C=b.c AND c.c=a.C AND a.score>70 AND a.C='01') '[70_85]'
,(SELECT COUNT(*)FROM sc a WHERE a.score>70 AND a.C=b.c  AND c.c=a.C AND a.score>60 AND a.C='01') '[60_70]'
,(SELECT COUNT(*)FROM sc a WHERE a.score<60 AND a.C=b.c  AND c.c=a.C AND a.C='01') '60一下'
,(SELECT COUNT()FROM sc a WHERE a.score>85 AND a.C=b.c  AND c.c=a.C AND a.C='01')/(SELECT COUNT()FROM sc WHERE c='01'AND C=b.c AND c.c=c) '85以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score<85 AND a.C=b.c  AND c.c=a.C AND a.score>70 AND a.C='01')/(SELECT COUNT()FROM sc WHERE c='01'AND C=b.c AND c.c=c) '[70_85]以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score>70 AND a.C=b.c  AND c.c=a.C AND a.score>60 AND a.C='01')/(SELECT COUNT()FROM sc WHERE c='01'AND C=b.c AND c.c=c)'[60_70]以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score<60 AND a.C=b.c AND c.c=a.C  AND a.C='01')/(SELECT COUNT()FROM sc WHERE c='01'AND C=b.c AND c.c=c)'60以上比率'
FROM sc b ,course c WHERE b.c=c.c AND c.c='01'
UNION ALL
SELECT
c.Cname
,(SELECT COUNT(*)FROM sc a WHERE a.score>85 AND a.C=b.c AND c.c=a.C AND  a.C='02') '85以上'
,(SELECT COUNT(*)FROM sc a WHERE a.score<85 AND a.C=b.c AND c.c=a.C AND a.score>70 AND a.C='02') '[70_85]'
,(SELECT COUNT(*)FROM sc a WHERE a.score>70 AND a.C=b.c  AND c.c=a.C AND a.score>60 AND a.C='02') '[60_70]'
,(SELECT COUNT(*)FROM sc a WHERE a.score<60 AND a.C=b.c  AND c.c=a.C AND a.C='02') '60一下'
,(SELECT COUNT()FROM sc a WHERE a.score>85 AND a.C=b.c  AND c.c=a.C AND a.C='02')/(SELECT COUNT()FROM sc WHERE c='02'AND C=b.c AND c.c=c) '85以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score<85 AND a.C=b.c  AND c.c=a.C AND a.score>70 AND a.C='02')/(SELECT COUNT()FROM sc WHERE c='02'AND C=b.c AND c.c=c)'[70_85]以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score>70 AND a.C=b.c  AND c.c=a.C AND a.score>60 AND a.C='02')/(SELECT COUNT()FROM sc WHERE c='02'AND C=b.c AND c.c=c)'[60_70]以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score<60 AND a.C=b.c AND c.c=a.C  AND a.C='02')/(SELECT COUNT()FROM sc WHERE c='02'AND C=b.c AND c.c=c)'60以上比率'
FROM sc b ,course c WHERE b.c=c.c AND c.c='02'
UNION ALL
SELECT
c.Cname
,(SELECT COUNT(*)FROM sc a WHERE a.score>85 AND a.C=b.c AND c.c=a.C AND  a.C='03') '85以上'
,(SELECT COUNT(*)FROM sc a WHERE a.score<85 AND a.C=b.c AND c.c=a.C AND a.score>70 AND a.C='03') '[70_85]'
,(SELECT COUNT(*)FROM sc a WHERE a.score>70 AND a.C=b.c  AND c.c=a.C AND a.score>60 AND a.C='03') '[60_70]'
,(SELECT COUNT(*)FROM sc a WHERE a.score<60 AND a.C=b.c  AND c.c=a.C AND a.C='03') '60一下'
,(SELECT COUNT()FROM sc a WHERE a.score>85 AND a.C=b.c  AND c.c=a.C AND a.C='03')/(SELECT COUNT()FROM sc WHERE c='03'AND C=b.c AND c.c=c) '85以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score<85 AND a.C=b.c  AND c.c=a.C AND a.score>70 AND a.C='03')/(SELECT COUNT()FROM sc WHERE c='03'AND C=b.c AND c.c=c)'[70_85]以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score>70 AND a.C=b.c  AND c.c=a.C AND a.score>60 AND a.C='03')/(SELECT COUNT()FROM sc WHERE c='03'AND C=b.c AND c.c=c)'[60_70]以上比率'
,(SELECT COUNT()FROM sc a WHERE a.score<60 AND a.C=b.c AND c.c=a.C  AND a.C='01')/(SELECT COUNT()FROM sc WHERE c='03'AND C=b.c AND c.c=c)'60以上比率'
FROM sc b ,course c WHERE b.c=c.c AND c.c='03') a

--24、查詢學生平均成績及其名次

SELECT
a.s
,a.avgscore
,@rownum:=@rownum +1 AS rownum
FROM 
(SELECT
s
,AVG(score) avgscore
FROM
sc 
GROUP BY s
ORDER BY avgscore DESC
) a
,(SELECT @rownum:=0)r

--25、查詢各科成績前三名的記錄

SELECT
a.*
,b.*
FROM
(SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='01'AND a.score>b.score)+1 mc
FROM sc b  WHERE b.c='01' HAVING mc BETWEEN 1 AND 3
UNION ALL
SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='02'AND a.score>b.score)+1 mc
FROM sc b  WHERE b.c='02' HAVING mc BETWEEN 1 AND 3
UNION ALL
SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='03'AND a.score>b.score)+1 mc
FROM sc b  WHERE b.c='03' HAVING mc BETWEEN 1 AND 3
) a
,student b
WHERE
a.s =b.s

--26、查詢每門課程被選修的學生數

SELECT
a.Cname
,COUNT(b.c)
FROM sc b,course a 
WHERE a.c =b.c
GROUP BY b.c

--27、查詢出隻有兩門課程的全部學生的學號和姓名

SELECT
b.S
,b.Sname
,a.countc
FROM
(SELECT
s 
,COUNT(c) countc
FROM 
sc
GROUP BY s
HAVING countc =2) a
,student b
WHERE
a.s=b.s

--28、查詢男生、女生人數

select s.Ssex,COUNT(*)from student s where s.Ssex='男'
UNION
select s.Ssex,COUNT(*)from student s where s.Ssex='女'

--29、查詢名字中含有"風"字的學生信息

SELECT
*
,count(*)
FROM student 
WHERE
Sname rLIKE '風'

--30、查詢同名同性學生名單，並統計同名人數

SELECT
s.Sname
,s.Ssex
,COUNT(*) countnum
from
student s
GROUP BY
s.Sname,s.Ssex
HAVING
countnum>=2

--31、查詢1990年出生的學生名單(注：Student表中Sage列的類型是datetime)

SELECT
*
FROM
student
WHERE
Sage LIKE '1990%'

--32、查詢每門課程的平均成績，結果按平均成績降序排列，平均成績相同時，按課程編號

SELECT
a.Cname
,AVG(sc.score) avgscore
FROM sc ,course a
WHERE sc.C =a.C
GROUP BY sc.C
ORDER BY avgscore DESC

--33、查詢平均成績大於等於85的所有學生的學號、姓名和平均成績

SELECT
*
FROM
(SELECT
a.Sname
,a.S
,AVG(sc.score) avgscore
FROM sc ,student a
WHERE sc.s =a.s 
GROUP BY sc.s
ORDER BY avgscore DESC
) a
WHERE
a.avgscore>85

--34、查詢課程名稱為"數學"，且分數低於60的學生姓名和分數

SELECT
*
FROM
sc a,course b
WHERE 
a.c =b.c AND b.Cname='數學' AND a.score>60

--35、查詢所有學生的課程及分數情況；

SELECT
*
FROM
student a
,course b
,sc c
WHERE
a.S=c.S AND b.C =c.C
 ```
--36、查詢任何一門課程成績在70分以上的姓名、課程名稱和分數；

SELECT
b.Sname
,c.Cname
,a.score
FROM
sc a, student b,course c
WHERE
a.score>70 AND a.C =c.C AND a.S =b.S

--37、查詢不及格的課程

SELECT
b.Sname
,c.Cname
,a.score
FROM
sc a, student b,course c
WHERE
a.score<60 AND a.C =c.C AND a.S =b.S

--38、查詢課程編號為01且課程成績在80分以上的學生的學號和姓名；

SELECT
c.S
,c.Sname
,a.Cname
,b.score
FROM
course a ,sc b ,student c
WHERE a.C =b.C AND b.score>=80 AND c.S =b.S AND a.C='01'

--39、求每門課程的學生人數

SELECT
b.Cname
,COUNT(a.c)
FROM
sc a ,course b
WHERE
b.c=a.C
GROUP BY
a.C

--40、查詢選修"張三"老師所授課程的學生中，成績最高的學生信息及其成績

SELECT
b.*
,MAX(c.score)
FROM
teacher a,student b ,sc c ,course d
WHERE
a.T =d.T AND d.C =c.C AND c.S =b.S AND a.Tname ='張三'

--41、查詢不同課程成績相同的學生的學生編號、課程編號、學生成績

SELECT c. FROM sc c GROUP BY c.C,c.score HAVING COUNT()>1;

--42、查詢每門功成績最好的前兩名

SELECT
a.*
,b.*
FROM
(SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='01'AND a.score>b.score)+1 mc
FROM sc b WHERE b.c='01' HAVING mc BETWEEN 1 AND 2
UNION ALL
SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='02'AND a.score>b.score)+1 mc
FROM sc b WHERE b.c='02' HAVING mc BETWEEN 1 AND 2
UNION ALL
SELECT b.s ,b.C ,b.score
,(SELECT COUNT(*) FROM sc a WHERE a.c='03'AND a.score>b.score)+1 mc
FROM sc b WHERE b.c='03' HAVING mc BETWEEN 1 AND 2
) a
,student b
WHERE
a.s =b.s

--43、統計每門課程的學生選修人數（超過5人的課程才統計）。要求輸出課程號和選修人數，查詢結果按人數降序排列，若人數相同，按課程號升序排列

SELECT
b.C
,b.Cname
,COUNT(a.C) countc
FROM
sc a,course b
WHERE
a.c=b.C
GROUP BY
a.C
HAVING countc>5
ORDER BY countc DESC

--44、檢索至少選修兩門課程的學生學號

SELECT
sc.S
,COUNT(sc.C) countc
FROM
sc
GROUP BY sc.S
HAVING countc >=2

--45、查詢選修了全部課程的學生信息

SELECT
a.*
,COUNT(sc.C) countc
FROM
sc ,student a
WHERE sc.S =a.S
GROUP BY sc.S
HAVING countc =3


--46、查詢各學生的年齡

SELECT
s.s,
s.sname,
EXTRACT(YEAR FROM NOW())-EXTRACT(YEAR FROM s.sage) 年齡
FROM
student s

--47、查詢本周過生日的學生

SELECT
s.S
,s.Sname
,s.Sage
FROM student s
WHERE YEARWEEK(DATE_FORMAT(s.Sage,'%Y-%m-%d')) =YEARWEEK(NOW())

--48、查詢下周過生日的學生

SELECT
s.S
,s.Sname
,s.Sage
FROM student s
WHERE YEARWEEK(DATE_FORMAT(s.Sage,'%Y-%m-%d')) =YEARWEEK(NOW())+1

--49、查詢本月過生日的學生

SELECT
s.S
,s.Sname
,s.Sage
FROM student s
WHERE MONTH(DATE_FORMAT(s.Sage,'%Y-%m-%d')) =MONTH(NOW())

--50、查詢下月過生日的學生

SELECT
s.S
,s.Sname
,s.Sage
FROM student s
WHERE MONTH(DATE_FORMAT(s.Sage,'%Y-%m-%d')) =MONTH(NOW())+1


#其中有三四個題做的不盡人意勉強實現需求

最後更新：2017-11-01 21:33:27

SQL 經典五十道題

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SQL 經典五十道題

上一篇： 筆記：Wide & Deep Learning for Recommender Systems

下一篇： #文末福利|阿裏雲大學雙11促銷優惠# 阿裏雲大學11月份6項全新Apsara Clouder技能認證上線

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上一篇：筆記：Wide & Deep Learning for Recommender Systems