从两个表中的信息合并到一个表

Question

我需要的信息从两个表合并成一个表，下表是

table 1 
+----+---------------+---------+ 
|id_k| name  | value | 
+----+---------------+---------+ 
| 1 | enak   | 4  | 
| 2 | nor   | 3  | 
+----+---------------+---------+ 

table 2 
+------+------+---------+ 
| id_d | id_k | feel | 
+------+------+---------+ 
| 1 | 1 | good | 
| 2 | 1 | better | 
| 3 | 1 | verygood| 
+------+------+---------+ 

结果应该是

+------+------+-------+------------------------+ 
| id_d | name | value |   feel  | 
+------+------+-------+------------------------+ 
| 1 | enak | 4 | good, better, verygood | 
| 2 | nor | 3 |      | 
+------+------+-------+------------------------+ 

这是我的代码[不工作]

select k.name, k.value, s.feel 
from table1 as k 
left join table2 as s on s.id_k=k.id_k 

Answer 1

http://sqlfiddle.com/#!9/3a7564/1

SELECT t1.id_k, 
    t1.`name`, 
    t1.`value`, 
    GROUP_CONCAT(t2.feel) AS feel 
FROM  table1 t1 
LEFT JOIN table2 t2 
ON t1.id_k = t2.id_k 
GROUP BY t1.id_k 

Answer 2

您可以使用gorup_concat函数来协调来自tabl的值E2在结果昏迷分隔的字符串：

SELECT table1.id_k, name, value, GROUP_CONCAT(feel SEPARATOR ', ') AS feel 
FROM  table1 
JOIN  table2 ON table1.id_k = table2.id_k 
GROUP BY table1.id_k