Oracle查询获取书名？

Question

table name:id 
col1:owner-name 
col2:book-id1 
col3:book-id2 

table name:book-name 
col1:id 
col2:name 

谁能给我一个查询来获取使用上述2台

Answer 1

SELECT id.owner-name, b1.name "book1-name", b2.name "book2-name" 
FROM id 
LEFT JOIN book-name "b1" ON b1.id = id.book-id1 
LEFT JOIN book-name "b2" ON b2.id = id.book-id2 

Answer 2

SELECT a.OWNER-NAME,b1.name book1,b2.name book2 
FROM ID a,BOOK-NAME b1,BOOK-NAME b2 
where a.book-id1= b1.id 
and a.book-id2= b2.id 

OR

SELECT a.OWNER-NAME, 
(SELECT b1.name from BOOK-NAME b1 where b1.id=a.book-id1) BOOK_NAME1, 
(SELECT b2.name from BOOK-NAME b2 where b2.id=a.book-id2) BOOK_NAME2 
FROM ID a