MySQL的GROUP BY 「和過濾器」

Question

比方說，我有這樣的查詢：

SELECT name, GROUP_CONCAT(number) 
FROM objects 
GROUP BY name 

，並將其輸出：

+----------+----------------------+ 
| NAME | GROUP_CONCAT(NUMBER) | 
+----------+----------------------+ 
| false_1 | 2,1     | 
| false_2 | 3,4     | 
| true_1 | 4,3,2,1    | 
| true_2 | 2,3     | 
+----------+----------------------+ 

現在，我怎麼能返回其2 AND 3爲number行？

注：此查詢分組 - 表有10行，像這樣：

+---------+--------+ 
| NAME | NUMBER | 
+---------+--------+ 
| true_1 | 1  | 
| true_1 | 2  | 
| true_1 | 3  | 
| ...  | ... | 
+---------+--------+ 

[Link to SQLFiddle]

Answer 1

SELECT name, GROUP_CONCAT(number) 
FROM objects 
WHERE number IN (2,3) 
GROUP BY name 
HAVING COUNT(*) = 2 

• SEE SQLFiddle Demo

，或者如果你想保留w的全部價值HICH名下有，

SELECT a.name, GROUP_CONCAT(A.number) 
FROM objects a 
     INNER JOIN 
     (
      SELECT name 
      FROM objects 
      WHERE number IN (2,3) 
      GROUP BY name 
      HAVING COUNT(*) = 2 
     ) b ON a.Name = b.Name 
GROUP BY a.name 

• SEE SQLFiddle Demo