mysql的连接查询

Question

我有2代表这样

Table 1 

id name 
1 ABC 
2 DEF 
3 GEF 


Table 2 
name meal 
ABC m1 
ABC m2 
GEF m1 

Table 3 
meal detail 
m1 mutton 
m2 beaf 

我怎样才能得到输出这样？

Id name meal_detail 
1 ABC mutton,beaf 
2 DEF 
3 GEF mutton 

由于提前

Answer 1

SELECT t1.id, 
      t1.`name`, 
      GROUP_CONCAT(t3.detail) AS `meal_detail` 
    FROM t1 
LEFT JOIN t2 ON t2.`name` = t1.`name` 
LEFT JOIN t3 ON t3.meal = t2.meal 
GROUP BY t1.`name`