我需要创建一个将两个表(游戏和开发人员)结合在一起的视图,并从游戏表中选择gameID gameName和gameDeveloper,并将具有firstname和lastname的gameDeveloper(来自Developers表)替换为一列。 gameDeveloper与developerID相同,但不是故意使用的外键。我只想从包含匹配的developerID的行中选择名字和姓氏,并将它们组合到新视图的一列中。这是我所拥有的:
CREATE TABLE game (
gameID varchar(3) PRIMARY KEY NOT NULL,
gamenameName varchar(30) NOT NULL,
gameDeveloper varchar(3) NOT NULL
);
INSERT INTO game VALUES (1,'RDR2',2);
INSERT INTO game VALUES (2,'GTAV',7);
INSERT INTO game VALUES (3,'PUBG',9);
/
CREATE TABLE developers (
developerID varchar(3) PRIMARY KEY NOT
NULL,
fname varchar(20) NOT NULL,
lname varchar(20) NOT NULL,
gameID varchar(3) NOT NULL,
CONSTRAINT fk_game
FOREIGN KEY (gameID)
REFERENCES game (GameID)
);
INSERT INTO developers VALUES
(1,'Patrick','Kane',1);
INSERT INTO developers VALUES
(2,'Jonathan','Toews',1);
INSERT INTO developers VALUES
(3,'Alex','Debrincat',1);
INSERT INTO developers VALUES
(4,'Andrew','Shaw',2);
INSERT INTO developers VALUES
(5,'Alex','Nylander',2);
INSERT INTO developers VALUES
(6,'Oli','Maata',2);
INSERT INTO developers VALUES
(7,'Calvin','DeHaan',2);
INSERT INTO developers VALUES
(8,'Brandon','Saad',3);
INSERT INTO developers VALUES
(9,'Corey','Crawford',3);
INSERT INTO developers VALUES
(10,'Connor','Murphy',3);
/
CREATE OR REPLACE VIEW chairs AS
SELECT firstname, lastname
FROM developer
INNER JOIN
我希望决赛桌在映射并组合的最后一个单元格时看起来像这样,但是我对执行该操作感到迷茫。我认为内部联接将是最佳选择?