显示ulli数据的mysql查询和php代码

我有两张桌子

第二张桌子是Tbl_书

用于显示的mysql查询和php代码

 cat1  book1  book2 book5 
 cat2  book4

怎么样

select c.category, 
       group_concat(b.bookname separator ' ') as books
from tbl_category c
inner join tbl_book b on b.cat_id = c.id
group by c.category

---

感谢您的帮助我想再问一个问题5本书的限制然后这里将描述一种方法：

 cat1  book1  book2 book5 
 cat2  book4

select c.category, 
       group_concat(b.bookname separator ' ') as books
from tbl_category c
inner join tbl_book b on b.cat_id = c.id
group by c.category