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所以我试着如下为“列出所有由作家盖尔书面和由袖珍书印刷书籍”SQL查询忽略条件
我的数据库表是
Table: author
authorNumber, authorName
01 Gale
02 Ben
Table: book
bookCode, bookTitle, publishCode
189 Press & Trash PB
3743 Ecommerce PB
Table: publisher
publisherCode, publisherName
PB Pocket Books
BB Batman Books
Table: wrote
bookCode, authorNumber
189 01
3743 02
这是我的查询,它忽略了我的大风条件,只是得到所有由袖珍书出版的书籍,有什么帮助?
SELECT bookTitle
FROM Book B, Wrote BC, Author, Publisher PC
WHERE B.bookCode = BC.bookCode
AND B.publisherCode = PC.publisherCode
AND authorName ='Gale'
AND publisherName ='Pocket Books'
GROUP BY bookTitle;