如何在 SQL 的嵌套子查询中查找不同的列？
How to find distinct columns in a nested subquery in SQL?
我需要找到订购 'VODKA' 和 'WHISKY' 的不同饮酒者。我只允许使用嵌套查询。不接受其他格式。
我是 sql 的新手，所以非常感谢您的帮助！
以下是我试图从中检索数据的表：
CREATE TABLE DRINKERS ( /* All drinkers */
DRINKER VARCHAR(30) NOT NULL,
CONSTRAINT DRINKERS_PKEY PRIMARY KEY (DRINKER));
CREATE TABLE ORDERS( /* Drinkers visit pubs and consumes drinks */
DRINKER VARCHAR(30) NOT NULL, /* Drinker name */
PUB VARCHAR(30) NOT NULL, /* Pub name */
ODATE DATE NOT NULL, /* Order date */
DRINK VARCHAR(30) NOT NULL, /* Drink name */
DRINK_NO DECIMAL(2) NOT NULL, /* A sequence number of a drink */
CONSTRAINT ORDERS_PKEY PRIMARY KEY(DRINKER, PUB, ODATE, DRINK, DRINK_NO),
CONSTRAINT ORDERS_FKEY1 FOREIGN KEY(PUB, DRINK) REFERENCES SERVES(PUB, DRINK),
CONSTRAINT ORDERS_FKEY2 FOREIGN KEY(DRINKER) REFERENCES DRINKERS(DRINKER) );
这是我目前的 SELECT 声明：
SELECT DISTINCT DRINKER
FROM DRINKERS
WHERE EXISTS (SELECT DRINKER
FROM ORDERS
WHERE DRINKERS.DRINKER = ORDERS.DRINKER
AND DRINK = 'VODKA' AND 'WHISKY');
插入语句：
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('8-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('8-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('9-JAN-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('11-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('13-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('15-JAN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('16-JAN-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'GREASY FORK', STR_TO_DATE('17-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 4);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'PORT', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'PORT', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('01-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('02-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'GREASY FORK', STR_TO_DATE('03-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('05-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('06-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'GREASY FORK', STR_TO_DATE('15-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LITTLE PIRATE', STR_TO_DATE('16-FEB-2020', '%d-%M-%Y'), 'CHAMPAGNE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LITTLE PIRATE', STR_TO_DATE('17-FEB-2020', '%d-%M-%Y'), 'CHAMPAGNE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('20-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('22-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('01-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('04-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('05-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('01-APR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('02-MAY-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('03-MAY-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('04-MAY-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('01-JUN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('02-JUN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('8-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('9-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('11-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('12-JUL-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('13-JUL-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-AUG-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 2);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 4);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 5);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('11-JAN-2020','%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('PETER', 'LAZY LOBSTER', STR_TO_DATE('09-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('PETER', 'GREASY FORK', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 4);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 5);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 6);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 7);
INSERT INTO ORDERS VALUES('MARY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('MARY', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('MARY', 'CAPTAIN MOORE', STR_TO_DATE('03-MAR- 2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('MARY', 'LONG JOHN', STR_TO_DATE('05-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('MARY', 'GREASY FORK', STR_TO_DATE('24-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('13-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('JOHN', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 3);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'RED WINE', 4);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'WHITE WINE', 5);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'RED WINE', 6);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('04-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'CAPTAIN MOORE', STR_TO_DATE('15-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LONG JOHN', STR_TO_DATE('10-JAN-2020','%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'COGNAC', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'COGNAC', 2);
INSERT INTO ORDERS VALUES('JAMES', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'COGNAC', 3);
INSERT INTO ORDERS VALUES('JAMES', 'LONG JOHN', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LITTLE PIRATE', STR_TO_DATE('03- MAR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'SWEET DREAMS', STR_TO_DATE('23-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHISKY', 2);
INSERT INTO ORDERS VALUES('SERGIEY', 'GREASY FORK', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('06-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('23-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('09-MAR-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LITTLE PIRATE', STR_TO_DATE('04-APR-2020', '%d-%M-%Y'), 'VODKA', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 2);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 4);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('15-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('15-JAN-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('CLAUDE', 'GREASY FORK', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LAZY LOBSTER', STR_TO_DATE('04-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LAZY LOBSTER', STR_TO_DATE('05-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LAZY LOBSTER', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'GREASY FORK', STR_TO_DATE('20-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-APR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('15-APR- 2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('16-APR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('17-APR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
期望的输出：
DRINKER
SERGIEY
您可以使用 hanving 来计算 DRINKER 的不同饮料组
SELECT DRINKERS.DRINKER
FROM DRINKERS
INNER JOIN ORDERS DRINKERS.DRINKER = ORDERS.DRINKER
WHERE ORDERS.DRINK IN ( 'VODKA' , 'WHISKY')
GROUP BY DRINKER
HAVING COUNT(DISTINCT ORDERS.DRINK ) = 2
或者如果您需要嵌套
SELECT DISTINCT DRINKER
FROM DRINKERS
WHERE EXISTS (SELECT DRINKER
FROM ORDERS
WHERE DRINK IN ( 'VODKA' AND 'WHISKY')
GROUP BY DRINKER
HAVING COUNT(DISTINCT ORDERS.DRINK ) = 2
);
我想这会让你得到你想要的。在内部查询中，如果饮酒者既喝伏特加又喝威士忌，您会得到两行，否则您会得到 1 或 0。
HAVING COUNT(*)=2 只是 returns 两者都有。然后你就得到了不同的 DRINKER 列表。
由于 DRINKER 列出现在 ORDERS table 中，您根本不需要引用 DRINKERS table。
SELECT DISTINCT DRINKER
FROM (SELECT DRINKER, COUNT(*)
FROM (SELECT DISTINCT DRINKER, DRINK
FROM ORDERS
WHERE DRINK IN("VODKA","WHISKY"))
GROUP BY DRINKER
HAVING COUNT(*)=2)
我需要找到订购 'VODKA' 和 'WHISKY' 的不同饮酒者。我只允许使用嵌套查询。不接受其他格式。
我是 sql 的新手，所以非常感谢您的帮助！ 以下是我试图从中检索数据的表：
CREATE TABLE DRINKERS ( /* All drinkers */
DRINKER VARCHAR(30) NOT NULL,
CONSTRAINT DRINKERS_PKEY PRIMARY KEY (DRINKER));
CREATE TABLE ORDERS( /* Drinkers visit pubs and consumes drinks */
DRINKER VARCHAR(30) NOT NULL, /* Drinker name */
PUB VARCHAR(30) NOT NULL, /* Pub name */
ODATE DATE NOT NULL, /* Order date */
DRINK VARCHAR(30) NOT NULL, /* Drink name */
DRINK_NO DECIMAL(2) NOT NULL, /* A sequence number of a drink */
CONSTRAINT ORDERS_PKEY PRIMARY KEY(DRINKER, PUB, ODATE, DRINK, DRINK_NO),
CONSTRAINT ORDERS_FKEY1 FOREIGN KEY(PUB, DRINK) REFERENCES SERVES(PUB, DRINK),
CONSTRAINT ORDERS_FKEY2 FOREIGN KEY(DRINKER) REFERENCES DRINKERS(DRINKER) );
这是我目前的 SELECT 声明：
SELECT DISTINCT DRINKER
FROM DRINKERS
WHERE EXISTS (SELECT DRINKER
FROM ORDERS
WHERE DRINKERS.DRINKER = ORDERS.DRINKER
AND DRINK = 'VODKA' AND 'WHISKY');
插入语句：
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('8-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('8-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('9-JAN-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('11-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('13-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('15-JAN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('16-JAN-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'GREASY FORK', STR_TO_DATE('17-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('18-JAN-2020', '%d-%M-%Y'), 'BEER', 4);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'PORT', 2);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'PORT', 3);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('01-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('02-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'GREASY FORK', STR_TO_DATE('03-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'CAPTAIN MOORE', STR_TO_DATE('05-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('06-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'GREASY FORK', STR_TO_DATE('15-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LITTLE PIRATE', STR_TO_DATE('16-FEB-2020', '%d-%M-%Y'), 'CHAMPAGNE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LITTLE PIRATE', STR_TO_DATE('17-FEB-2020', '%d-%M-%Y'), 'CHAMPAGNE', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('19-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('20-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('22-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('01-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('04-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('05-MAR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('01-APR-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('02-MAY-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('03-MAY-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('04-MAY-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('01-JUN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LAZY LOBSTER', STR_TO_DATE('02-JUN-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('8-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('9-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('10-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('11-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('12-JUL-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('13-JUL-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JANUSZ', 'LONG JOHN', STR_TO_DATE('14-AUG-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 2);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 4);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 5);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('11-JAN-2020','%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('PETER', 'LAZY LOBSTER', STR_TO_DATE('09-FEB-2020', '%d-%M-%Y'), 'PORT', 1);
INSERT INTO ORDERS VALUES('PETER', 'GREASY FORK', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 4);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 5);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 6);
INSERT INTO ORDERS VALUES('PETER', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'BEER', 7);
INSERT INTO ORDERS VALUES('MARY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('MARY', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('MARY', 'CAPTAIN MOORE', STR_TO_DATE('03-MAR- 2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('MARY', 'LONG JOHN', STR_TO_DATE('05-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('MARY', 'GREASY FORK', STR_TO_DATE('24-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('13-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('JOHN', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'RED WINE', 3);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'RED WINE', 4);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'WHITE WINE', 5);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('12-FEB-2020', '%d-%M-%Y'), 'RED WINE', 6);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'LONG JOHN', STR_TO_DATE('04-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('JOHN', 'CAPTAIN MOORE', STR_TO_DATE('15-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LONG JOHN', STR_TO_DATE('10-JAN-2020','%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'COGNAC', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'COGNAC', 2);
INSERT INTO ORDERS VALUES('JAMES', 'LAZY LOBSTER', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'COGNAC', 3);
INSERT INTO ORDERS VALUES('JAMES', 'LONG JOHN', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'LITTLE PIRATE', STR_TO_DATE('03- MAR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('JAMES', 'SWEET DREAMS', STR_TO_DATE('23-JUN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHISKY', 2);
INSERT INTO ORDERS VALUES('SERGIEY', 'GREASY FORK', STR_TO_DATE('14-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('04-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('06-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('23-FEB-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('03-MAR-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LAZY LOBSTER', STR_TO_DATE('09-MAR-2020', '%d-%M-%Y'), 'WHISKY', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LITTLE PIRATE', STR_TO_DATE('04-APR-2020', '%d-%M-%Y'), 'VODKA', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 2);
INSERT INTO ORDERS VALUES('SERGIEY', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'BEER', 3);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('10-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 2);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 3);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 4);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('15-JAN-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('15-JAN-2020', '%d-%M-%Y'), 'RED WINE', 2);
INSERT INTO ORDERS VALUES('CLAUDE', 'GREASY FORK', STR_TO_DATE('19-JAN-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LAZY LOBSTER', STR_TO_DATE('04-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LAZY LOBSTER', STR_TO_DATE('05-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LAZY LOBSTER', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'GREASY FORK', STR_TO_DATE('20-APR-2020', '%d-%M-%Y'), 'BEER', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('12-APR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('15-APR- 2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('16-APR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('17-APR-2020', '%d-%M-%Y'), 'WHITE WINE', 1);
INSERT INTO ORDERS VALUES('CLAUDE', 'LONG JOHN', STR_TO_DATE('19-APR-2020', '%d-%M-%Y'), 'RED WINE', 1);
期望的输出：
DRINKER
SERGIEY
您可以使用 hanving 来计算 DRINKER 的不同饮料组
SELECT DRINKERS.DRINKER
FROM DRINKERS
INNER JOIN ORDERS DRINKERS.DRINKER = ORDERS.DRINKER
WHERE ORDERS.DRINK IN ( 'VODKA' , 'WHISKY')
GROUP BY DRINKER
HAVING COUNT(DISTINCT ORDERS.DRINK ) = 2
或者如果您需要嵌套
SELECT DISTINCT DRINKER
FROM DRINKERS
WHERE EXISTS (SELECT DRINKER
FROM ORDERS
WHERE DRINK IN ( 'VODKA' AND 'WHISKY')
GROUP BY DRINKER
HAVING COUNT(DISTINCT ORDERS.DRINK ) = 2
);
我想这会让你得到你想要的。在内部查询中，如果饮酒者既喝伏特加又喝威士忌，您会得到两行，否则您会得到 1 或 0。
HAVING COUNT(*)=2 只是 returns 两者都有。然后你就得到了不同的 DRINKER 列表。
由于 DRINKER 列出现在 ORDERS table 中，您根本不需要引用 DRINKERS table。
SELECT DISTINCT DRINKER
FROM (SELECT DRINKER, COUNT(*)
FROM (SELECT DISTINCT DRINKER, DRINK
FROM ORDERS
WHERE DRINK IN("VODKA","WHISKY"))
GROUP BY DRINKER
HAVING COUNT(*)=2)