php - MySQL join 将多行匹配为单列数据

Question

我需要找出 mysql 的多个匹配行，就像单列一样 我的第一张 table

id name
1  aaaa
2  bbbb
3  cccc

第二个表

Book_id pri_id book_name
1        1      BookA
2        1      BookB
3        1      BookC
4        2      BookA
5        2      BookB
6        3      BookA 

我需要将结果显示为， id 名称 书籍

id   name   booklist
1    aaaa   BookA, BookB, Bookc
2    bbbb   BookA, BookB
3    cccc   BookA

有人帮忙解决这个问题

Answer 1

SELECT ft.id, ft.name, GROUP_CONCAT(st.bockname SEPARATOR ', ')
FROM firstTable ft
LEFT JOIN secondTable st ON ft.id = st.pri_id
GROUP BY ft.id
ORDER BY ft.name;