Student(S#,Sname,Sage,Ssex) 瀛︾敓琛?br />Course(C#,Cname,T#) 璇劇▼琛?br />SC(S#,C#,score) 鎴愮嘩琛?br />Teacher(T#,Tname) 鏁欏笀琛?/span>
闂錛?br />1銆佹煡璇?#8220;001”璇劇▼姣?#8220;002”璇劇▼鎴愮嘩楂樼殑鎵鏈夊鐢熺殑瀛﹀彿錛?br />select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
from SC where C#='002') b
where a.score>b.score and a.s#=b.s#;
2銆佹煡璇㈠鉤鍧囨垚緇╁ぇ浜?0鍒嗙殑鍚屽鐨勫鍙峰拰騫沖潎鎴愮嘩錛?br /> select S#,avg(score)
from sc
group by S# having avg(score) >60;
3銆佹煡璇㈡墍鏈夊悓瀛︾殑瀛﹀彿銆佸鍚嶃侀夎鏁般佹繪垚緇╋紱
select Student.S#,Student.Sname,count(SC.C#),sum(score)
from Student left Outer join SC on Student.S#=SC.S#
group by Student.S#,Sname
4銆佹煡璇㈠“鏉?#8221;鐨勮佸笀鐨勪釜鏁幫紱
select count(distinct(Tname))
from Teacher
where Tname like '鏉?';
5銆佹煡璇㈡病瀛﹁繃“鍙跺鉤”鑰佸笀璇劇殑鍚屽鐨勫鍙楓佸鍚嶏紱
select Student.S#,Student.Sname
from Student
where S# not in (select distinct( SC.S#) from SC,Course,Teacher where SC.C#=Course.C# and Teacher.T#=Course.T# and Teacher.Tname='鍙跺鉤');
6銆佹煡璇㈠榪?#8220;001”騫朵笖涔熷榪囩紪鍙?#8220;002”璇劇▼鐨勫悓瀛︾殑瀛﹀彿銆佸鍚嶏紱
select Student.S#,Student.Sname from Student,SC where Student.S#=SC.S# and SC.C#='001'and exists( Select * from SC as SC_2 where SC_2.S#=SC.S# and SC_2.C#='002');
7銆佹煡璇㈠榪?#8220;鍙跺鉤”鑰佸笀鎵鏁欑殑鎵鏈夎鐨勫悓瀛︾殑瀛﹀彿銆佸鍚嶏紱
select S#,Sname
from Student
where S# in (select S# from SC ,Course ,Teacher where SC.C#=Course.C# and Teacher.T#=Course.T# and Teacher.Tname='鍙跺鉤' group by S# having count(SC.C#)=(select count(C#) from Course,Teacher where Teacher.T#=Course.T# and Tname='鍙跺鉤'));
8銆佹煡璇㈣紼嬬紪鍙?#8220;002”鐨勬垚緇╂瘮璇劇▼緙栧彿“001”璇劇▼浣庣殑鎵鏈夊悓瀛︾殑瀛﹀彿銆佸鍚嶏紱
Select S#,Sname from (select Student.S#,Student.Sname,score ,(select score from SC SC_2 where SC_2.S#=Student.S# and SC_2.C#='002') score2
from Student,SC where Student.S#=SC.S# and C#='001') S_2 where score2 <score;
9銆佹煡璇㈡墍鏈夎紼嬫垚緇╁皬浜?0鍒嗙殑鍚屽鐨勫鍙楓佸鍚嶏紱
select S#,Sname
from Student
where S# not in (select Student.S# from Student,SC where S.S#=SC.S# and score>60);
10銆佹煡璇㈡病鏈夊鍏ㄦ墍鏈夎鐨勫悓瀛︾殑瀛﹀彿銆佸鍚嶏紱
select Student.S#,Student.Sname
from Student,SC
where Student.S#=SC.S# group by Student.S#,Student.Sname having count(C#) <(select count(C#) from Course);
11銆佹煡璇㈣嚦灝戞湁涓闂ㄨ涓庡鍙蜂負“1001”鐨勫悓瀛︽墍瀛︾浉鍚岀殑鍚屽鐨勫鍙峰拰濮撳悕錛?br /> select S#,Sname from Student,SC where Student.S#=SC.S# and C# in select C# from SC where S#='1001';
12銆佹煡璇㈣嚦灝戝榪囧鍙蜂負“001”鍚屽鎵鏈変竴闂ㄨ鐨勫叾浠栧悓瀛﹀鍙峰拰濮撳悕錛?br /> select distinct SC.S#,Sname
from Student,SC
where Student.S#=SC.S# and C# in (select C# from SC where S#='001');
13銆佹妸“SC”琛ㄤ腑“鍙跺鉤”鑰佸笀鏁欑殑璇劇殑鎴愮嘩閮芥洿鏀逛負姝よ紼嬬殑騫沖潎鎴愮嘩錛?br /> update SC set score=(select avg(SC_2.score)
from SC SC_2
where SC_2.C#=SC.C# ) from Course,Teacher where Course.C#=SC.C# and Course.T#=Teacher.T# and Teacher.Tname='鍙跺鉤');
14銆佹煡璇㈠拰“1002”鍙風殑鍚屽瀛︿範鐨勮紼嬪畬鍏ㄧ浉鍚岀殑鍏朵粬鍚屽瀛﹀彿鍜屽鍚嶏紱
select S# from SC where C# in (select C# from SC where S#='1002')
group by S# having count(*)=(select count(*) from SC where S#='1002');
15銆佸垹闄ゅ涔?#8220;鍙跺鉤”鑰佸笀璇劇殑SC琛ㄨ褰曪紱
Delect SC
from course ,Teacher
where Course.C#=SC.C# and Course.T#= Teacher.T# and Tname='鍙跺鉤';
16銆佸悜SC琛ㄤ腑鎻掑叆涓浜涜褰曪紝榪欎簺璁板綍瑕佹眰絎﹀悎浠ヤ笅鏉′歡錛氭病鏈変笂榪囩紪鍙?#8220;003”璇劇▼鐨勫悓瀛﹀鍙楓?銆?br /> 鍙瘋鐨勫鉤鍧囨垚緇╋紱
Insert SC select S#,'002',(Select avg(score)
from SC where C#='002') from Student where S# not in (Select S# from SC where C#='002');
17銆佹寜騫沖潎鎴愮嘩浠庨珮鍒頒綆鏄劇ず鎵鏈夊鐢熺殑“鏁版嵁搴?#8221;銆?#8220;浼佷笟綆＄悊”銆?#8220;鑻辮”涓夐棬鐨勮紼嬫垚緇╋紝鎸夊涓嬪艦寮忔樉紺猴細瀛︾敓ID,,鏁版嵁搴?浼佷笟綆＄悊,鑻辮,鏈夋晥璇劇▼鏁?鏈夋晥騫沖潎鍒?br /> SELECT S# as 瀛︾敓ID
,(SELECT score FROM SC WHERE SC.S#=t.S# AND C#='004') AS 鏁版嵁搴?br /> ,(SELECT score FROM SC WHERE SC.S#=t.S# AND C#='001') AS 浼佷笟綆＄悊
,(SELECT score FROM SC WHERE SC.S#=t.S# AND C#='006') AS 鑻辮
,COUNT(*) AS 鏈夋晥璇劇▼鏁? AVG(t.score) AS 騫沖潎鎴愮嘩
FROM SC AS t
GROUP BY S#
ORDER BY avg(t.score)
18銆佹煡璇㈠悇縐戞垚緇╂渶楂樺拰鏈浣庣殑鍒嗭細浠ュ涓嬪艦寮忔樉紺猴細璇劇▼ID錛屾渶楂樺垎錛屾渶浣庡垎
SELECT L.C# As 璇劇▼ID,L.score AS 鏈楂樺垎,R.score AS 鏈浣庡垎
FROM SC L ,SC AS R
WHERE L.C# = R.C# and
L.score = (SELECT MAX(IL.score)
FROM SC AS IL,Student AS IM
WHERE L.C# = IL.C# and IM.S#=IL.S#
GROUP BY IL.C#)
AND
R.Score = (SELECT MIN(IR.score)
FROM SC AS IR
WHERE R.C# = IR.C#
GROUP BY IR.C#
);
19銆佹寜鍚勭騫沖潎鎴愮嘩浠庝綆鍒伴珮鍜屽強鏍肩巼鐨勭櫨鍒嗘暟浠庨珮鍒頒綆欏哄簭
SELECT t.C# AS 璇劇▼鍙?max(course.Cname)AS 璇劇▼鍚?isnull(AVG(score),0) AS 騫沖潎鎴愮嘩
,100 * SUM(CASE WHEN isnull(score,0)>=60 THEN 1 ELSE 0 END)/COUNT(*) AS 鍙婃牸鐧懼垎鏁?br /> FROM SC T,Course
where t.C#=course.C#
GROUP BY t.C#
ORDER BY 100 * SUM(CASE WHEN isnull(score,0)>=60 THEN 1 ELSE 0 END)/COUNT(*) DESC
20銆佹煡璇㈠涓嬭紼嬪鉤鍧囨垚緇╁拰鍙婃牸鐜囩殑鐧懼垎鏁?鐢?1琛?鏄劇ず): 浼佷笟綆＄悊錛?01錛夛紝椹厠鎬濓紙002錛夛紝OO&UML 錛?03錛夛紝鏁版嵁搴擄紙004錛?br /> SELECT SUM(CASE WHEN C# ='001' THEN score ELSE 0 END)/SUM(CASE C# WHEN '001' THEN 1 ELSE 0 END) AS 浼佷笟綆＄悊騫沖潎鍒?br /> ,100 * SUM(CASE WHEN C# = '001' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '001' THEN 1 ELSE 0 END) AS 浼佷笟綆＄悊鍙婃牸鐧懼垎鏁?br /> ,SUM(CASE WHEN C# = '002' THEN score ELSE 0 END)/SUM(CASE C# WHEN '002' THEN 1 ELSE 0 END) AS 椹厠鎬濆鉤鍧囧垎
,100 * SUM(CASE WHEN C# = '002' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '002' THEN 1 ELSE 0 END) AS 椹厠鎬濆強鏍肩櫨鍒嗘暟
,SUM(CASE WHEN C# = '003' THEN score ELSE 0 END)/SUM(CASE C# WHEN '003' THEN 1 ELSE 0 END) AS UML騫沖潎鍒?br /> ,100 * SUM(CASE WHEN C# = '003' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '003' THEN 1 ELSE 0 END) AS UML鍙婃牸鐧懼垎鏁?br /> ,SUM(CASE WHEN C# = '004' THEN score ELSE 0 END)/SUM(CASE C# WHEN '004' THEN 1 ELSE 0 END) AS 鏁版嵁搴撳鉤鍧囧垎
,100 * SUM(CASE WHEN C# = '004' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '004' THEN 1 ELSE 0 END) AS 鏁版嵁搴撳強鏍肩櫨鍒嗘暟
FROM SC
21銆佹煡璇笉鍚岃佸笀鎵鏁欎笉鍚岃紼嬪鉤鍧囧垎浠庨珮鍒頒綆鏄劇ず
SELECT max(Z.T#) AS 鏁欏笀ID,MAX(Z.Tname) AS 鏁欏笀濮撳悕,C.C# AS 璇劇▼錛╋激,MAX(C.Cname) AS 璇劇▼鍚嶇О,AVG(Score) AS 騫沖潎鎴愮嘩
FROM SC AS T,Course AS C ,Teacher AS Z
where T.C#=C.C# and C.T#=Z.T#
GROUP BY C.C#
ORDER BY AVG(Score) DESC
22銆佹煡璇㈠涓嬭紼嬫垚緇╃ 3 鍚嶅埌絎?6 鍚嶇殑瀛︾敓鎴愮嘩鍗曪細浼佷笟綆＄悊錛?01錛夛紝椹厠鎬濓紙002錛夛紝UML 錛?03錛夛紝鏁版嵁搴擄紙004錛?br /> [瀛︾敓ID],[瀛︾敓濮撳悕],浼佷笟綆＄悊,椹厠鎬?UML,鏁版嵁搴?騫沖潎鎴愮嘩
SELECT DISTINCT top 3
SC.S# As 瀛︾敓瀛﹀彿,
Student.Sname AS 瀛︾敓濮撳悕 ,
T1.score AS 浼佷笟綆＄悊,
T2.score AS 椹厠鎬?
T3.score AS UML,
T4.score AS 鏁版嵁搴?
ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0) as 鎬誨垎
FROM Student,SC LEFT JOIN SC AS T1
ON SC.S# = T1.S# AND T1.C# = '001'
LEFT JOIN SC AS T2
ON SC.S# = T2.S# AND T2.C# = '002'
LEFT JOIN SC AS T3
ON SC.S# = T3.S# AND T3.C# = '003'
LEFT JOIN SC AS T4
ON SC.S# = T4.S# AND T4.C# = '004'
WHERE student.S#=SC.S# and
ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0)
NOT IN
(SELECT
DISTINCT
TOP 15 WITH TIES
ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0)
FROM sc
LEFT JOIN sc AS T1
ON sc.S# = T1.S# AND T1.C# = 'k1'
LEFT JOIN sc AS T2
ON sc.S# = T2.S# AND T2.C# = 'k2'
LEFT JOIN sc AS T3
ON sc.S# = T3.S# AND T3.C# = 'k3'
LEFT JOIN sc AS T4
ON sc.S# = T4.S# AND T4.C# = 'k4'
ORDER BY ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0) DESC);
23銆佺粺璁″垪鍗板悇縐戞垚緇?鍚勫垎鏁版浜烘暟:璇劇▼ID,璇劇▼鍚嶇О,[100-85],[85-70],[70-60],[ <60]
SELECT SC.C# as 璇劇▼ID, Cname as 璇劇▼鍚嶇О
,SUM(CASE WHEN score BETWEEN 85 AND 100 THEN 1 ELSE 0 END) AS [100 - 85]
,SUM(CASE WHEN score BETWEEN 70 AND 85 THEN 1 ELSE 0 END) AS [85 - 70]
,SUM(CASE WHEN score BETWEEN 60 AND 70 THEN 1 ELSE 0 END) AS [70 - 60]
,SUM(CASE WHEN score < 60 THEN 1 ELSE 0 END) AS [60 -]
FROM SC,Course
where SC.C#=Course.C#
GROUP BY SC.C#,Cname;
24銆佹煡璇㈠鐢熷鉤鍧囨垚緇╁強鍏跺悕嬈?br /> SELECT 1+(SELECT COUNT( distinct 騫沖潎鎴愮嘩)
FROM (SELECT S#,AVG(score) AS 騫沖潎鎴愮嘩
FROM SC
GROUP BY S#
) AS T1
WHERE 騫沖潎鎴愮嘩 > T2.騫沖潎鎴愮嘩) as 鍚嶆,
S# as 瀛︾敓瀛﹀彿,騫沖潎鎴愮嘩
FROM (SELECT S#,AVG(score) 騫沖潎鎴愮嘩
FROM SC
GROUP BY S#
) AS T2
ORDER BY 騫沖潎鎴愮嘩 desc;
25銆佹煡璇㈠悇縐戞垚緇╁墠涓夊悕鐨勮褰?(涓嶈冭檻鎴愮嘩騫跺垪鎯呭喌)
SELECT t1.S# as 瀛︾敓ID,t1.C# as 璇劇▼ID,Score as 鍒嗘暟
FROM SC t1
WHERE score IN (SELECT TOP 3 score
FROM SC
WHERE t1.C#= C#
ORDER BY score DESC
)
ORDER BY t1.C#;
26銆佹煡璇㈡瘡闂ㄨ紼嬭閫変慨鐨勫鐢熸暟
select c#,count(S#) from sc group by C#;
27銆佹煡璇㈠嚭鍙変慨浜嗕竴闂ㄨ紼嬬殑鍏ㄩ儴瀛︾敓鐨勫鍙峰拰濮撳悕
select SC.S#,Student.Sname,count(C#) AS 閫夎鏁?br />from SC ,Student
where SC.S#=Student.S# group by SC.S# ,Student.Sname having count(C#)=1;
28銆佹煡璇㈢敺鐢熴佸コ鐢熶漢鏁?br /> Select count(Ssex) as 鐢風敓浜烘暟 from Student group by Ssex having Ssex='鐢?;
Select count(Ssex) as 濂崇敓浜烘暟 from Student group by Ssex having Ssex='濂?錛?br />29銆佹煡璇㈠“寮?#8221;鐨勫鐢熷悕鍗?br /> SELECT Sname FROM Student WHERE Sname like '寮?';
30銆佹煡璇㈠悓鍚嶅悓鎬у鐢熷悕鍗曪紝騫剁粺璁″悓鍚嶄漢鏁?br />select Sname,count(*) from Student group by Sname having count(*)>1;;
31銆?981騫村嚭鐢熺殑瀛︾敓鍚嶅崟(娉細Student琛ㄤ腑Sage鍒楃殑綾誨瀷鏄痙atetime)
select Sname, CONVERT(char (11),DATEPART(year,Sage)) as age
from student
where CONVERT(char(11),DATEPART(year,Sage))='1981';
32銆佹煡璇㈡瘡闂ㄨ紼嬬殑騫沖潎鎴愮嘩錛岀粨鏋滄寜騫沖潎鎴愮嘩鍗囧簭鎺掑垪錛屽鉤鍧囨垚緇╃浉鍚屾椂錛屾寜璇劇▼鍙烽檷搴忔帓鍒?br /> Select C#,Avg(score) from SC group by C# order by Avg(score),C# DESC ;
33銆佹煡璇㈠鉤鍧囨垚緇╁ぇ浜?5鐨勬墍鏈夊鐢熺殑瀛﹀彿銆佸鍚嶅拰騫沖潎鎴愮嘩
select Sname,SC.S# ,avg(score)
from Student,SC
where Student.S#=SC.S# group by SC.S#,Sname having avg(score)>85;
34銆佹煡璇㈣紼嬪悕縐頒負“鏁版嵁搴?#8221;錛屼笖鍒嗘暟浣庝簬60鐨勫鐢熷鍚嶅拰鍒嗘暟
Select Sname,isnull(score,0)
from Student,SC,Course
where SC.S#=Student.S# and SC.C#=Course.C# and Course.Cname='鏁版嵁搴?and score <60;
35銆佹煡璇㈡墍鏈夊鐢熺殑閫夎鎯呭喌錛?br /> SELECT SC.S#,SC.C#,Sname,Cname
FROM SC,Student,Course
where SC.S#=Student.S# and SC.C#=Course.C# ;
36銆佹煡璇換浣曚竴闂ㄨ紼嬫垚緇╁湪70鍒嗕互涓婄殑濮撳悕銆佽紼嬪悕縐板拰鍒嗘暟錛?br /> SELECT distinct student.S#,student.Sname,SC.C#,SC.score
FROM student,Sc
WHERE SC.score>=70 AND SC.S#=student.S#;
37銆佹煡璇笉鍙婃牸鐨勮紼嬶紝騫舵寜璇劇▼鍙蜂粠澶у埌灝忔帓鍒?br /> select c# from sc where scor e <60 order by C# ;
38銆佹煡璇㈣紼嬬紪鍙蜂負003涓旇紼嬫垚緇╁湪80鍒嗕互涓婄殑瀛︾敓鐨勫鍙峰拰濮撳悕錛?br /> select SC.S#,Student.Sname from SC,Student where SC.S#=Student.S# and Score>80 and C#='003';
39銆佹眰閫変簡璇劇▼鐨勫鐢熶漢鏁?br /> select count(*) from sc;
40銆佹煡璇㈤変慨“鍙跺鉤”鑰佸笀鎵鎺堣紼嬬殑瀛︾敓涓紝鎴愮嘩鏈楂樼殑瀛︾敓濮撳悕鍙婂叾鎴愮嘩
select Student.Sname,score
from Student,SC,Course C,Teacher
where Student.S#=SC.S# and SC.C#=C.C# and C.T#=Teacher.T# and Teacher.Tname='鍙跺鉤' and SC.score=(select max(score)from SC where C#=C.C# );
41銆佹煡璇㈠悇涓紼嬪強鐩稿簲鐨勯変慨浜烘暟
select count(*) from sc group by C#;
42銆佹煡璇笉鍚岃紼嬫垚緇╃浉鍚岀殑瀛︾敓鐨勫鍙楓佽紼嬪彿銆佸鐢熸垚緇?br />select distinct A.S#,B.score from SC A ,SC B where A.Score=B.Score and A.C# <>B.C# ;
43銆佹煡璇㈡瘡闂ㄥ姛鎴愮嘩鏈濂界殑鍓嶄袱鍚?br /> SELECT t1.S# as 瀛︾敓ID,t1.C# as 璇劇▼ID,Score as 鍒嗘暟
FROM SC t1
WHERE score IN (SELECT TOP 2 score
FROM SC
WHERE t1.C#= C#
ORDER BY score DESC
)
ORDER BY t1.C#;
44銆佺粺璁℃瘡闂ㄨ紼嬬殑瀛︾敓閫変慨浜烘暟錛堣秴榪?0浜虹殑璇劇▼鎵嶇粺璁★級銆傝姹傝緭鍑鴻紼嬪彿鍜岄変慨浜烘暟錛屾煡璇㈢粨鏋滄寜浜烘暟闄嶅簭鎺掑垪錛屾煡璇㈢粨鏋滄寜浜烘暟闄嶅簭鎺掑垪錛岃嫢浜烘暟鐩稿悓錛屾寜璇劇▼鍙峰崌搴忔帓鍒?br /> select C# as 璇劇▼鍙?count(*) as 浜烘暟
from sc
group by C#
order by count(*) desc,c#
45銆佹绱㈣嚦灝戦変慨涓ら棬璇劇▼鐨勫鐢熷鍙?br /> select S#
from sc
group by s#
having count(*) > = 2
46銆佹煡璇㈠叏閮ㄥ鐢熼兘閫変慨鐨勮紼嬬殑璇劇▼鍙峰拰璇劇▼鍚?br /> select C#,Cname
from Course
where C# in (select c# from sc group by c#)
47銆佹煡璇㈡病瀛﹁繃“鍙跺鉤”鑰佸笀璁叉巿鐨勪換涓闂ㄨ紼嬬殑瀛︾敓濮撳悕
select Sname from Student where S# not in (select S# from Course,Teacher,SC where Course.T#=Teacher.T# and SC.C#=course.C# and Tname='鍙跺鉤');
48銆佹煡璇袱闂ㄤ互涓婁笉鍙婃牸璇劇▼鐨勫悓瀛︾殑瀛﹀彿鍙婂叾騫沖潎鎴愮嘩
select S#,avg(isnull(score,0)) from SC where S# in (select S# from SC where score <60 group by S# having count(*)>2)group by S#;
49銆佹绱?#8220;004”璇劇▼鍒嗘暟灝忎簬60錛屾寜鍒嗘暟闄嶅簭鎺掑垪鐨勫悓瀛﹀鍙?br /> select S# from SC where C#='004'and score <60 order by score desc;
50銆佸垹闄?#8220;002”鍚屽鐨?#8220;001”璇劇▼鐨勬垚緇?br />delete from Sc where S#='001'and C#='001';
鏈鐢ㄥ埌涓嬮潰涓変釜鍏崇郴琛細
CARD 鍊熶功鍗°?span> CNO 鍗″彿錛孨AME 濮撳悕錛孋LASS 鐝駭
BOOKS 鍥句功銆?span> BNO 涔﹀彿錛孊NAME 涔﹀悕,AUTHOR 浣滆咃紝PRICE 鍗曚環錛孮UANTITY 搴撳瓨鍐屾暟
BORROW 鍊熶功璁板綍銆?CNO 鍊熶功鍗″彿錛孊NO 涔﹀彿錛孯DATE 榪樹功鏃ユ湡
澶囨敞錛氶檺瀹氭瘡浜烘瘡縐嶄功鍙兘鍊熶竴鏈紱搴撳瓨鍐屾暟闅忓熶功銆佽繕涔﹁屾敼鍙樸?/span>
瑕佹眰瀹炵幇濡備笅15涓鐞嗭細
1錛?鍐欏嚭寤虹珛BORROW琛ㄧ殑SQL璇彞錛岃姹傚畾涔変富鐮佸畬鏁存х害鏉熷拰寮曠敤瀹屾暣鎬х害鏉熴?/span>
2錛?鎵懼嚭鍊熶功瓚呰繃5鏈殑璇昏?杈撳嚭鍊熶功鍗″彿鍙婃墍鍊熷浘涔﹀唽鏁般?/span>
3錛?鏌ヨ鍊熼槄浜?姘存祾"涓涔︾殑璇昏咃紝杈撳嚭濮撳悕鍙婄彮綰с?/span>
4錛?鏌ヨ榪囨湡鏈繕鍥句功錛岃緭鍑哄熼槄鑰咃紙鍗″彿錛夈佷功鍙峰強榪樹功鏃ユ湡銆?/span>
5錛?鏌ヨ涔﹀悕鍖呮嫭"緗戠粶"鍏抽敭璇嶇殑鍥句功錛岃緭鍑轟功鍙楓佷功鍚嶃佷綔鑰呫?/span>
6錛?鏌ヨ鐜版湁鍥句功涓環鏍兼渶楂樼殑鍥句功錛岃緭鍑轟功鍚嶅強浣滆呫?/span>
7錛?鏌ヨ褰撳墠鍊熶簡"璁＄畻鏂規硶"浣嗘病鏈夊?璁＄畻鏂規硶涔犻闆?鐨勮鑰咃紝杈撳嚭鍏跺熶功鍗″彿錛屽茍鎸夊崱鍙烽檷搴忔帓搴忚緭鍑恒?/span>
8錛?灝?C01"鐝悓瀛︽墍鍊熷浘涔︾殑榪樻湡閮藉歡闀夸竴鍛ㄣ?/span>
9錛?浠嶣OOKS琛ㄤ腑鍒犻櫎褰撳墠鏃犱漢鍊熼槄鐨勫浘涔﹁褰曘?/span>
10錛庡鏋滅粡甯告寜涔﹀悕鏌ヨ鍥句功淇℃伅錛岃寤虹珛鍚堥傜殑绱㈠紩銆?/span>
11錛庡湪BORROW琛ㄤ笂寤虹珛涓涓Е鍙戝櫒錛屽畬鎴愬涓嬪姛鑳斤細濡傛灉璇昏呭熼槄鐨勪功鍚嶆槸"鏁版嵁搴撴妧鏈強搴旂敤"錛屽氨灝嗚璇昏呯殑鍊熼槄璁板綍淇濆瓨鍦?/span>
BORROW_SAVE琛ㄤ腑錛堟敞ORROW_SAVE琛ㄧ粨鏋勫悓BORROW琛級銆?/span>
12錛庡緩绔嬩竴涓鍥撅紝鏄劇ず"鍔?1"鐝鐢熺殑鍊熶功淇℃伅錛堝彧瑕佹眰鏄劇ず濮撳悕鍜屼功鍚嶏級銆?/span>
13錛庢煡璇㈠綋鍓嶅悓鏃跺熸湁"璁＄畻鏂規硶"鍜?緇勫悎鏁板"涓ゆ湰涔︾殑璇昏咃紝杈撳嚭鍏跺熶功鍗″彿錛屽茍鎸夊崱鍙峰崌搴忔帓搴忚緭鍑恒?/span>
14錛庡亣瀹氬湪寤築OOKS琛ㄦ椂娌℃湁瀹氫箟涓葷爜錛屽啓鍑轟負BOOKS琛ㄨ拷鍔犲畾涔変富鐮佺殑璇彞銆?/span>
15錛庡CARD琛ㄥ仛濡備笅淇敼錛?/span>
a. 灝哊AME鏈澶у垪瀹藉鍔犲埌10涓瓧絎︼紙鍋囧畾鍘熶負6涓瓧絎︼級銆?/span>
b. 涓鴻琛ㄥ鍔?鍒桸AME錛堢郴鍚嶏級錛屽彲鍙橀暱錛屾渶澶?0涓瓧絎︺?/span>
1. 鍐欏嚭寤虹珛BORROW琛ㄧ殑SQL璇彞錛岃姹傚畾涔変富鐮佸畬鏁存х害鏉熷拰寮曠敤瀹屾暣鎬х害鏉?/span>
--瀹炵幇浠ｇ爜錛?/span>
CREATE TABLE BORROW(
CNO int FOREIGN KEY REFERENCES CARD(CNO),
BNO int FOREIGN KEY REFERENCES BOOKS(BNO),
RDATE datetime,
PRIMARY KEY(CNO,BNO))
2. 鎵懼嚭鍊熶功瓚呰繃5鏈殑璇昏?杈撳嚭鍊熶功鍗″彿鍙婃墍鍊熷浘涔﹀唽鏁?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT CNO,鍊熷浘涔﹀唽鏁?COUNT(*)
FROM BORROW
GROUP BY CNO
HAVING COUNT(*)>5
3. 鏌ヨ鍊熼槄浜?姘存祾"涓涔︾殑璇昏咃紝杈撳嚭濮撳悕鍙婄彮綰?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT * FROM CARD c
WHERE EXISTS(
SELECT * FROM BORROW a,BOOKS b
WHERE a.BNO=b.BNO
AND b.BNAME=N'姘存祾'
AND a.CNO=c.CNO)
4. 鏌ヨ榪囨湡鏈繕鍥句功錛岃緭鍑哄熼槄鑰咃紙鍗″彿錛夈佷功鍙峰強榪樹功鏃ユ湡
--瀹炵幇浠ｇ爜錛?/span>
SELECT * FROM BORROW
WHERE RDATE<GETDATE()
5. 鏌ヨ涔﹀悕鍖呮嫭"緗戠粶"鍏抽敭璇嶇殑鍥句功錛岃緭鍑轟功鍙楓佷功鍚嶃佷綔鑰?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT BNO,BNAME,AUTHOR FROM BOOKS
WHERE BNAME LIKE N'%緗戠粶%'
6. 鏌ヨ鐜版湁鍥句功涓環鏍兼渶楂樼殑鍥句功錛岃緭鍑轟功鍚嶅強浣滆?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT BNO,BNAME,AUTHOR FROM BOOKS
WHERE PRICE=(
SELECT MAX(PRICE) FROM BOOKS)
7. 鏌ヨ褰撳墠鍊熶簡"璁＄畻鏂規硶"浣嗘病鏈夊?璁＄畻鏂規硶涔犻闆?鐨勮鑰咃紝杈撳嚭鍏跺熶功鍗″彿錛屽茍鎸夊崱鍙烽檷搴忔帓搴忚緭鍑?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT a.CNO
FROM BORROW a,BOOKS b
WHERE a.BNO=b.BNO AND b.BNAME=N'璁＄畻鏂規硶'
AND NOT EXISTS(
SELECT * FROM BORROW aa,BOOKS bb
WHERE aa.BNO=bb.BNO
AND bb.BNAME=N'璁＄畻鏂規硶涔犻闆?
AND aa.CNO=a.CNO)
ORDER BY a.CNO DESC
8. 灝?C01"鐝悓瀛︽墍鍊熷浘涔︾殑榪樻湡閮藉歡闀夸竴鍛?/span>
--瀹炵幇浠ｇ爜錛?/span>
UPDATE b SET RDATE=DATEADD(Day,7,b.RDATE)
FROM CARD a,BORROW b
WHERE a.CNO=b.CNO
AND a.CLASS=N'C01'
9. 浠嶣OOKS琛ㄤ腑鍒犻櫎褰撳墠鏃犱漢鍊熼槄鐨勫浘涔﹁褰?/span>
--瀹炵幇浠ｇ爜錛?/span>
DELETE A FROM BOOKS a
WHERE NOT EXISTS(
SELECT * FROM BORROW
WHERE BNO=a.BNO)
10. 濡傛灉緇忓父鎸変功鍚嶆煡璇㈠浘涔︿俊鎭紝璇峰緩绔嬪悎閫傜殑绱㈠紩
--瀹炵幇浠ｇ爜錛?/span>
CREATE CLUSTERED INDEX IDX_BOOKS_BNAME ON BOOKS(BNAME)
11. 鍦˙ORROW琛ㄤ笂寤虹珛涓涓Е鍙戝櫒錛屽畬鎴愬涓嬪姛鑳斤細濡傛灉璇昏呭熼槄鐨勪功鍚嶆槸"鏁版嵁搴撴妧鏈強搴旂敤"錛屽氨灝嗚璇昏呯殑鍊熼槄璁板綍淇濆瓨鍦˙ORROW_SAVE
琛ㄤ腑錛堟敞ORROW_SAVE琛ㄧ粨鏋勫悓BORROW琛級
--瀹炵幇浠ｇ爜錛?/span>
CREATE TRIGGER TR_SAVE ON BORROW
FOR INSERT,UPDATE
AS
IF @@ROWCOUNT>0
INSERT BORROW_SAVE SELECT i.*
FROM INSERTED i,BOOKS b
WHERE i.BNO=b.BNO
AND b.BNAME=N'鏁版嵁搴撴妧鏈強搴旂敤'
12. 寤虹珛涓涓鍥撅紝鏄劇ず"鍔?1"鐝鐢熺殑鍊熶功淇℃伅錛堝彧瑕佹眰鏄劇ず濮撳悕鍜屼功鍚嶏級
--瀹炵幇浠ｇ爜錛?/span>
CREATE VIEW V_VIEW
AS
SELECT a.NAME,b.BNAME
FROM BORROW ab,CARD a,BOOKS b
WHERE ab.CNO=a.CNO
AND ab.BNO=b.BNO
AND a.CLASS=N'鍔?1'
13. 鏌ヨ褰撳墠鍚屾椂鍊熸湁"璁＄畻鏂規硶"鍜?緇勫悎鏁板"涓ゆ湰涔︾殑璇昏咃紝杈撳嚭鍏跺熶功鍗″彿錛屽茍鎸夊崱鍙峰崌搴忔帓搴忚緭鍑?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT a.CNO
FROM BORROW a,BOOKS b
WHERE a.BNO=b.BNO
AND b.BNAME IN(N'璁＄畻鏂規硶',N'緇勫悎鏁板')
GROUP BY a.CNO
HAVING COUNT(*)=2
ORDER BY a.CNO DESC
14. 鍋囧畾鍦ㄥ緩BOOKS琛ㄦ椂娌℃湁瀹氫箟涓葷爜錛屽啓鍑轟負BOOKS琛ㄨ拷鍔犲畾涔変富鐮佺殑璇彞
--瀹炵幇浠ｇ爜錛?/span>
ALTER TABLE BOOKS ADD PRIMARY KEY(BNO)
15.1 灝哊AME鏈澶у垪瀹藉鍔犲埌10涓瓧絎︼紙鍋囧畾鍘熶負6涓瓧絎︼級
--瀹炵幇浠ｇ爜錛?/span>
ALTER TABLE CARD ALTER COLUMN NAME varchar(10)
15.2 涓鴻琛ㄥ鍔?鍒桸AME錛堢郴鍚嶏級錛屽彲鍙橀暱錛屾渶澶?0涓瓧絎?/span>
--瀹炵幇浠ｇ爜錛?/span>
ALTER TABLE CARD ADD 緋誨悕 varchar(20)
闂鎻忚堪錛?/span>
涓虹鐞嗗矖浣嶄笟鍔″煿璁俊鎭紝寤虹珛3涓〃:
S (S#,SN,SD,SA) S#,SN,SD,SA 鍒嗗埆浠ｈ〃瀛﹀彿銆佸鍛樺鍚嶃佹墍灞炲崟浣嶃佸鍛樺勾榫?/span>
C (C#,CN ) C#,CN 鍒嗗埆浠ｈ〃璇劇▼緙栧彿銆佽紼嬪悕縐?/span>
SC ( S#,C#,G ) S#,C#,G 鍒嗗埆浠ｈ〃瀛﹀彿銆佹墍閫変慨鐨勮紼嬬紪鍙楓佸涔犳垚緇?/span>
瑕佹眰瀹炵幇濡備笅5涓鐞嗭細
1. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ閫変慨璇劇▼鍚嶇О涓?#8217;紼庢敹鍩虹’鐨勫鍛樺鍙峰拰濮撳悕
2. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ閫変慨璇劇▼緙栧彿涓?#8217;C2’鐨勫鍛樺鍚嶅拰鎵灞炲崟浣?/span>
3. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ涓嶉変慨璇劇▼緙栧彿涓?#8217;C5’鐨勫鍛樺鍚嶅拰鎵灞炲崟浣?/span>
4. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ閫変慨鍏ㄩ儴璇劇▼鐨勫鍛樺鍚嶅拰鎵灞炲崟浣?/span>
5. 鏌ヨ閫変慨浜嗚紼嬬殑瀛﹀憳浜烘暟
6. 鏌ヨ閫変慨璇劇▼瓚呰繃5闂ㄧ殑瀛﹀憳瀛﹀彿鍜屾墍灞炲崟浣?/span>
1. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ閫変慨璇劇▼鍚嶇О涓?#8217;紼庢敹鍩虹’鐨勫鍛樺鍙峰拰濮撳悕
--瀹炵幇浠ｇ爜錛?/span>
SELECT SN,SD FROM S
WHERE [S#] IN(
SELECT [S#] FROM C,SC
WHERE C.[C#]=SC.[C#]
AND CN=N'紼庢敹鍩虹')
2. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ閫変慨璇劇▼緙栧彿涓?#8217;C2’鐨勫鍛樺鍚嶅拰鎵灞炲崟浣?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT S.SN,S.SD FROM S,SC
WHERE S.[S#]=SC.[S#]
AND SC.[C#]='C2'
3. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ涓嶉変慨璇劇▼緙栧彿涓?#8217;C5’鐨勫鍛樺鍚嶅拰鎵灞炲崟浣?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT SN,SD FROM S
WHERE [S#] NOT IN(
SELECT [S#] FROM SC
WHERE [C#]='C5')
4. 浣跨敤鏍囧噯SQL宓屽璇彞鏌ヨ閫変慨鍏ㄩ儴璇劇▼鐨勫鍛樺鍚嶅拰鎵灞炲崟浣?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT SN,SD FROM S
WHERE [S#] IN(
SELECT [S#] FROM SC
RIGHT JOIN C ON SC.[C#]=C.[C#]
GROUP BY [S#]
HAVING COUNT(*)=COUNT(DISTINCT [S#]))
5. 鏌ヨ閫変慨浜嗚紼嬬殑瀛﹀憳浜烘暟
--瀹炵幇浠ｇ爜錛?/span>
SELECT 瀛﹀憳浜烘暟=COUNT(DISTINCT [S#]) FROM SC
6. 鏌ヨ閫変慨璇劇▼瓚呰繃5闂ㄧ殑瀛﹀憳瀛﹀彿鍜屾墍灞炲崟浣?/span>
--瀹炵幇浠ｇ爜錛?/span>
SELECT SN,SD FROM S
WHERE [S#] IN(
SELECT [S#] FROM SC
GROUP BY [S#]
HAVING COUNT(DISTINCT [C#])>5)
]]>
鑱旀帴鏉′歡鍙湪FROM鎴朩HERE瀛愬彞涓寚瀹氾紝寤鴻鍦‵ROM瀛愬彞涓寚瀹氳仈鎺ユ潯浠躲俉HERE鍜孒AVING瀛愬彞涔熷彲浠ュ寘鍚悳绱㈡潯浠訛紝浠ヨ繘涓姝ョ瓫閫夎仈鎺ユ潯浠舵墍閫夌殑琛屻?nbsp;
鑱旀帴鍙垎涓轟互涓嬪嚑綾伙細
1銆佸唴鑱旀帴錛堝吀鍨嬬殑鑱旀帴榪愮畻錛屼嬌鐢ㄥ儚 = 鎴?<> 涔嬬被鐨勬瘮杈冭繍綆楃錛夈傚寘鎷浉絳夎仈鎺ュ拰鑷劧鑱旀帴銆?nbsp;
鍐呰仈鎺ヤ嬌鐢ㄦ瘮杈冭繍綆楃鏍規嵁姣忎釜琛ㄥ叡鏈夌殑鍒楃殑鍊煎尮閰嶄袱涓〃涓殑琛屻備緥濡傦紝媯绱?students鍜宑ourses琛ㄤ腑瀛︾敓鏍囪瘑鍙風浉鍚岀殑鎵鏈夎銆?nbsp;
2銆佸鑱旀帴銆傚鑱旀帴鍙互鏄乏鍚戝鑱旀帴銆佸彸鍚戝鑱旀帴鎴栧畬鏁村閮ㄨ仈鎺ャ?nbsp;
鍦?FROM瀛愬彞涓寚瀹氬鑱旀帴鏃訛紝鍙互鐢變笅鍒楀嚑緇勫叧閿瓧涓殑涓緇勬寚瀹氾細
1錛?span style="color: #000000">LEFT JOIN鎴朙EFT OUTER JOIN
宸﹀悜澶栬仈鎺ョ殑緇撴灉闆嗗寘鎷? LEFT OUTER瀛愬彞涓寚瀹氱殑宸﹁〃鐨勬墍鏈夎錛岃屼笉浠呬粎鏄仈鎺ュ垪鎵鍖歸厤鐨勮銆傚鏋滃乏琛ㄧ殑鏌愯鍦ㄥ彸琛ㄤ腑娌℃湁鍖歸厤琛岋紝鍒欏湪鐩稿叧鑱旂殑緇撴灉闆嗚涓彸琛ㄧ殑鎵鏈夐夋嫨鍒楄〃鍒楀潎涓虹┖鍊箋?
2錛?span style="color: #000000">RIGHT JOIN 鎴?RIGHT OUTER JOIN
鍙沖悜澶栬仈鎺ユ槸宸﹀悜澶栬仈鎺ョ殑鍙嶅悜鑱旀帴銆傚皢榪斿洖鍙寵〃鐨勬墍鏈夎銆傚鏋滃彸琛ㄧ殑鏌愯鍦ㄥ乏琛ㄤ腑娌℃湁鍖歸厤琛岋紝鍒欏皢涓哄乏琛ㄨ繑鍥炵┖鍊箋?nbsp;
3錛?span style="color: #000000">FULL JOIN 鎴?FULL OUTER JOIN
瀹屾暣澶栭儴鑱旀帴榪斿洖宸﹁〃鍜屽彸琛ㄤ腑鐨勬墍鏈夎銆傚綋鏌愯鍦ㄥ彟涓涓〃涓病鏈夊尮閰嶈鏃訛紝鍒欏彟涓涓〃鐨勯夋嫨鍒楄〃鍒楀寘鍚┖鍊箋傚鏋滆〃涔嬮棿鏈夊尮閰嶈錛屽垯鏁翠釜緇撴灉闆嗚鍖呭惈鍩鴻〃鐨勬暟鎹箋?nbsp;
3銆佷氦鍙夎仈鎺?
浜ゅ弶鑱旀帴榪斿洖宸﹁〃涓殑鎵鏈夎錛屽乏琛ㄤ腑鐨勬瘡涓琛屼笌鍙寵〃涓殑鎵鏈夎緇勫悎銆備氦鍙夎仈鎺ヤ篃縐頒綔絎涘崱灝旂Н銆?nbsp;
FROM 瀛愬彞涓殑琛ㄦ垨瑙嗗浘鍙氳繃鍐呰仈鎺ユ垨瀹屾暣澶栭儴鑱旀帴鎸変換鎰忛『搴忔寚瀹氾紱浣嗘槸錛岀敤宸︽垨鍙沖悜澶栬仈鎺ユ寚瀹氳〃鎴栬鍥炬椂錛岃〃鎴栬鍥劇殑欏哄簭寰堥噸瑕併傛湁鍏充嬌鐢ㄥ乏鎴栧彸鍚戝鑱旀帴鎺掑垪琛ㄧ殑鏇村淇℃伅錛岃鍙傝浣跨敤澶栬仈鎺ャ?nbsp;
渚嬪瓙錛?
-------------------------------------------------
a琛? id name b琛? id job parent_id
1 寮? 1 23 1
2 鏉庡洓 2 34 2
3 鐜嬫 3 34 4
a.id鍚宲arent_id 瀛樺湪鍏崇郴
--------------------------------------------------
1錛?鍐呰繛鎺?
select a.*,b.* from a inner join b on a.id=b.parent_id
緇撴灉鏄?
1 寮? 1 23 1
2 鏉庡洓 2 34 2
2錛夊乏榪炴帴
select a.*,b.* from a left join b on a.id=b.parent_id
緇撴灉鏄?
1 寮? 1 23 1
2 鏉庡洓 2 34 2
3 鐜嬫 null
3錛?nbsp;鍙寵繛鎺?
select a.*,b.* from a right join b on a.id=b.parent_id
緇撴灉鏄?
1 寮? 1 23 1
2 鏉庡洓 2 34 2
null 3 34 4
4錛?nbsp;瀹屽叏榪炴帴
select a.*,b.* from a full join b on a.id=b.parent_id
緇撴灉鏄?
1 寮? 1 23 1
2 鏉庡洓 2 34 2
null 銆銆 3 34 4
3 鐜嬫 null
]]>