MySQL的 - 選擇基於多行條件

Question

比方說，我有這樣的：

|ID | Val | 
+---+-----+ 
| 1 | 10 | 
| 1 | 20 | 
| 1 | 30 | 
| 2 | 10 | 
| 2 | 20 | 
| 3 | 20 | 
| 3 | 30 | 
+---+-----+ 

，我需要只選擇那些ID-S同時具有10和30個值。所以，用英文，給我一個有10個和30個值的ID。 我該怎麼做？

Answer 1

你會使用這樣的：

select id 
from yourtable 
where val in (10, 30) 
group by id 
having count(distinct val) =2 

見SQL Fiddle with Demo

Answer 2

SELECT DISTINCT `ID` FROM tablename WHERE `VAL` IN ('10','30');