数据库作业10 第三章课后练习额

3.（1）

SELECT * 
FROM S 
WHERE A=10;

（2）

SELECT A,B 
FROM S;

（3）

SELECT A,B,S.C,S.D,E,F
FROM S,T
WHERE S.C=T.C AND S.D=T.D

（4）

SELECT S.*,T.*
 FROM S,T
  WHERE S.C=T.C;

（5）

SELECT *
FROM S,T
WHERE A<E

（6）

SELECT S1.C,S1.D,T.C,T.D,E,F
FROM T,(SELECT DISTINCT C,D
   FROM S)
   AS S1

4. spj表为
   .

 CREATE TABLE SPJ(SNO CHAR(4),
	             PNO CHAR(4),
	             JNO CHAR(4),
	             QTY SMALLINT
	             );
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S1','P1','J1',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S1','P1','J3',100);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S1','P1','J4',700);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S1','P2','J2',100);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S2','P3','J1',400);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S2','P3','J2',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S2','P3','J4',500);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S2','P3','J5',400);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S2','P5','J1',400);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S2','P5','J2',100);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S3','P1','J1',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S3','P3','J1',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S4','P5','J1',100);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S4','P6','J3',300);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S4','P6','J4',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S5','P2','J4',100);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S5','P3','J1',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S5','P6','J2',200);
INSERT INTO SPJ(SNO,PNO,JNO,QTY) VALUES('S5','P6','J4',500);

1）求供应工程J1零件的供应商号码SNO；

SELECT DISTINCT SNO FROM SPJ WHERE JNO='J1';

2）求供应工程J1零件P1的供应商号码SNO；

SELECT DISTINCT SNO FROM SPJ WHERE JNO='J1'AND PNO='P1';

3）求供应工程J1零件为红色的供应商号码 SNO；

SELECT SNO
FROM   SPJ,P
WHERE  P.PNO=SPJ.PNO AND JNO='J1' AND COLOR='红';​​​​​​​​​

4）求没有使用天津供应商生产的红色零件的工程号JNO；

SELECT JNO
FROM   J
WHERE NOT EXISTS(
SELECT *
FROM SPJ,S,P
WHERE S.CITY='天津' AND P.COLOR='红' AND SPJ.JNO=J.JNO AND SPJ.SNO=S.SNO AND SPJ.PNO=P.PNO​​​);​​​​​

5）求至少用了供应商S1所供应的全部零件的工程号JNO；

SELECT SPJ.JNO
FROM SPJ
WHERE NOT EXISTS
      (SELECT *
       FROM S
       WHERE NOT EXISTS
          (SELECT *
           FROM P
           WHERE P.PNO=SPJ.PNO
           AND SPJ.SNO=S.SNO
           )
       )

5.（1）

SELECT SNAME,CITY FROM S;

（2）

SELECT PNAME,COLOR,WEIGHT
 FROM P;

（3）

SELECT JNO FROM SPJ WHERE SNO='S1';

(4)

SELECT P.PNAME,SPJ.QTY FROM P,SPJ WHERE P.PNO=SPJ.PNO AND SPJ.JNO='J2';

(5)

SELECT SPJ.PNO FROM S,SPJ WHERE S.SNO=SPJ.SNO AND S.CITY='上海';

(6)

SELECT J.JNAME 
FROM J,S,SPJ 
WHERE S.SNO=SPJ.SNO AND S.CITY='上海'AND J.JNO=SPJ.JNO;

(7)

SELECT JNO 
FROM J 
WHERE JNO NOT IN(
SELECT JNO
FROM SPJ 
WHERE SNO IN(SELECT SNO
                            FROM S 
                            WHERE CITY='天津')
  )

(8)

UPDATE P SET COLOR='蓝' WHERE COLOR='红';

(9)

UPDATE SPJ SET SNO='S3' WHERE SNO='S5'AND JNO='J4'AND PNO='P6';

(10)

DELETE FROM SPJ WHERE SNO='S2';

(11)

INSERT INTO SPJ VALUES('S2','P4','J6',200)

CREATE VIEW VIEW_SPJ
AS
SELECT SNO,PNO,QTY
FROM   SPJ
WHERE  JNO=(SELECT JNO
FROM   J
WHERE  JNAME='三建')

1）找出三建工程项目使用的各种零件代码及其数量；

SELECT PNO,QTY
FROM   VIEW_SPJ

2）找出供应商S1的供应情况；

SELECT *
FROM SPJVIEW
WHERE SNO='S1'