[英]combine information from two tables into one table
我需要將兩個表中的信息組合到一個表中,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|
+------+------+---------+
結果應該是
+------+------+-------+------------------------+
| id_d | name | value | feel |
+------+------+-------+------------------------+
| 1 | enak | 4 | good, better, verygood |
| 2 | nor | 3 | |
+------+------+-------+------------------------+
這是我的代碼[無效]
select k.name, k.value, s.feel
from table1 as k
left join table2 as s on s.id_k=k.id_k
您可以使用gorup_concat
函數將table2中的值gorup_concat
為結果中以逗號分隔的字符串:
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
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
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