SQL如何展現人名單有沒有訂單

Question

我試圖解決這個SQL查詢（這是法語）

我有4個不同的表：CLIENT，COMMANDE（訂單），細節（的訂單）和PRODUIT（產品）

我必須給出沒有任何訂單的'Namur'（即在LOCALITE中）客戶的編號（NCLI）和名稱（NOM）（COMMANDE ）在查詢

我已經嘗試了不同的事情，我的SQL表達式中的最後一個代碼是這一個（這當然不起作用）

select NCLI, NOM 
from CLIENT 
where LOCALITE = 'Namur' and (NCLI in (select NCLI    
            from COMMANDE 
            where NCOM in (select NCOM 
                from DETAIL 
                where QCOM not in DETAIL))) 

任何人都可以幫我解決這個問題嗎？

的情況下，它需要的，這是我現有的表和插入的代碼：

create table CLIENT 
(NCLI char(4) not null, 
NOM varchar(12) not null, 
ADRESSE varchar(20) not null, 
LOCALITE varchar(12) not null, 
CAT char(2), 
COMPTE decimal(9,2) not null, 
primary key (NCLI)); 

create table PRODUIT 
(NPRO char(5) not null, 
LIBELLE varchar(20) not null, 
PRIX decimal(5,0) not null, 
QSTOCK decimal(6,0) not null, 
primary key (NPRO)); 

    create table COMMANDE 
(NCOM char(5) not null, 
NCLI char(4) not null, 
DATECOM datetime not null, 
primary key (NCOM), 
foreign key (NCLI) references CLIENT); 

create table DETAIL 
(NCOM char(5) not null, 
NPRO char(5) not null, 
QCOM decimal(4,0) not null, 
primary key (NCOM,NPRO), 
foreign key (NCOM) references COMMANDE, 
foreign key (NPRO) references PRODUIT); 




insert into CLIENT values ('B112','HANSENNE' ,'23, a. Dumont'  ,'Poitiers' ,'C1',1250.00); 
insert into CLIENT values ('C123','MERCIER'  ,'25, r. Lemaitre'  ,'Namur' ,'C1',-2300); 
insert into CLIENT values ('B332','MONTI'  ,'112, r. Neuve'  ,'Geneve' ,'B2',0); 
insert into CLIENT values ('F010','TOUSSAINT' ,'5, r. Godefroid'  ,'Poitiers' ,'C1',0); 
insert into CLIENT values ('K111','VANBIST'  ,'180, r. Florimont' ,'Lille' ,'B1',720); 
insert into CLIENT values ('S127','VANDERKA' ,'3, av. des Roses' ,'Namur' ,'C1',-4580); 
insert into CLIENT values ('B512','GILLET'  ,'14, r. de l''Ete' ,'Toulouse' ,'B1',-8700); 
insert into CLIENT values ('B062','GOFFIN'  ,'72, r. de la Gare' ,'Namur' ,'B2',-3200); 
insert into CLIENT values ('C400','FERARD'  ,'65, r. du Tertre' ,'Poitiers' ,'B2',350); 
insert into CLIENT values ('C003','AVRON'  ,'8, ch. de la Cure' ,'Toulouse' ,'B1',-1700); 
insert into CLIENT values ('K729','NEUMAN'  ,'40, r. Bransart'  ,'Toulouse' ,NULL,0); 
insert into CLIENT values ('F011','PONCELET' ,'17, Clos des Erables','Toulouse' ,'B2',0); 
insert into CLIENT values ('L422','FRANCK'  ,'60, r. de Wepion' ,'Namur' ,'C1',0); 
insert into CLIENT values ('S712','GUILLAUME' ,'14a, ch. des Roses' ,'Paris' ,'B1',0); 
insert into CLIENT values ('D063','MERCIER'  ,'201, bvd du Nord' ,'Toulouse' ,NULL,-2250); 
insert into CLIENT values ('F400','JACOB'  ,'78, ch. du Moulin' ,'Bruxelles','C2',0); 

insert into PRODUIT values ('CS262','CHEV. SAPIN 200x6x2', 75, 45); 
insert into PRODUIT values ('CS264','CHEV. SAPIN 200x6x4', 120,2690); 
insert into PRODUIT values ('CS464','CHEV. SAPIN 400x6x4', 220, 450); 
insert into PRODUIT values ('PA45' ,'POINTE ACIER 45 (1K)',105, 580); 
insert into PRODUIT values ('PA60' ,'POINTE ACIER 60 (1K)', 95, 134); 
insert into PRODUIT values ('PH222','PL. HETRE 200x20x2', 230, 782); 
insert into PRODUIT values ('PS222','PL. SAPIN 200x20x2', 185,1220); 

insert into COMMANDE values ('30178','K111','20081221'); 
insert into COMMANDE values ('30179','C400','20081222'); 
insert into COMMANDE values ('30182','S127','20081223'); 
insert into COMMANDE values ('30184','C400','20081223'); 
insert into COMMANDE values ('30185','F011','20090102'); 
insert into COMMANDE values ('30186','C400','20090102'); 
insert into COMMANDE values ('30188','B512','20090103'); 

insert into DETAIL values ('30178','CS464',25); 
insert into DETAIL values ('30179','PA60',20); 
insert into DETAIL values ('30179','CS262',60); 
insert into DETAIL values ('30182','PA60',30); 
insert into DETAIL values ('30184','CS464',120); 
insert into DETAIL values ('30184','PA45',20); 
insert into DETAIL values ('30185','PA60',15); 
insert into DETAIL values ('30185','PS222',600); 
insert into DETAIL values ('30185','CS464',260); 
insert into DETAIL values ('30186','PA45',3); 
insert into DETAIL values ('30188','PA60',70); 
insert into DETAIL values ('30188','PH222',92); 
insert into DETAIL values ('30188','CS464',180); 
insert into DETAIL values ('30188','PA45',22); 

Answer 1

工作的呢？

select c.NCLI, c.NOM 
from CLIENT c 
where c.LOCALITE = 'Namur' and c.NCLI NOT IN (select NCLI    
            from COMMANDE) 

Answer 2

爲什麼不試試這個：

select NCLI,NOM 
     from CLIENT 
     WHERE LOCALITE = 'NAMUR' AND NOT EXISTS(
              SELECT * 
              FROM COMMANDE 
              WHERE CLIENT.NCLI = COMMANDE .NCLI)