sql中 in 、not in 、exists、not exists 用法和差别
时间：2022-03-13 22:57
Algodata Infosystems
New Moon Books
USE pubs
GO
SELECT pub_name
FROM publishers
WHERENOTEXISTS
(SELECT*
FROM titles
WHERE pub_id = publishers.pub_id
AND type = /‘business/‘)
ORDERBY pub_name
GO
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