--查詢全部圖書的書名,做者名,出版社名稱(多表內鏈接)數據庫
use booksmanager --打開數據庫
select bookname as 圖書名稱,authorname as 做者名稱,c.publishername as 出版社名稱
from (books b inner join authors a --inner join 爲關鍵字,將兩個表連在一塊兒
on b.authorid=a.authorid) inner join publisher c
on b.publisherid=c.publisheridselect