数据
DROP TABLE IF EXISTS cats;
CREATE TABLE cats
(
litterID int NOT NULL,
catID int NOT null, --row uniquifier
catFirst varchar(30),
catLast varchar(30),
catSize int
);
INSERT INTO cats (litterID,catID,catFirst,catLast,catSize)
VALUES
('20020314','20262607','Scat','Meow','8'),
('20020314','20264036','Paws','Furbs','4'),
('20020314','20264267','Alexander','Meow','2');
问题
为每个 catID 创建一串它们的同窝仔(这是困难的部分......从成员集中删除它们)
预期产出
catID catFirst litterID littermates
-------- --------- -------- -----------------------------------------------
20262607 Scat 20020314 "Paws Furbs Size 4; Alexander Meow Size 2"
20264036 Paws 20020314 "Scat Meow Size 8; Alexander Meow Size 2"
20264267 Alexander 20020314 "Scat Meow Size 8; Paws Furbs Size 4"
我试过 EXCEPT 查询、CURSOR、WHILE。我认为解决方案在于交叉应用。