selecting data from a specific table in a database based on relation with another table

Question

I have two tables: book table with:bid,bname,bownerid,bedition. user table with:uid,uname, upass,uphone. i have created a relation between the two tables between bownerid as a foreign key and uid as its referenced key. my question is how to retrieve the uname from this relation when selecting all from book table.

Answer 1

尝试这个 ：

Select U.uname, B.* from user U, book B where U.uid = B.bownerid;

Answer 2

May be this is what you are looking for,

select b.*, u.uname from book b left outer join user u on u.uid = b.bowner_id;