具體標準

Question

，我需要選擇和組SQL組結果只有ID的所有他們ConditionId值都1

ID  ConditionId 
    2  0 
    2  1 
    2  0 
    3  0 
    3  0 
    4  1 
    4  1 

結果應該是：

ID  ConditionId    
4  1 

我該怎麼做？

Answer 1

這可以通過檢查每個id的行數是否等於表中每個id的conditionid = 1的行數來完成。

select id 
from tablename 
group by id 
having count(*) = count(case when conditionid = 1 then 1 end) 

Answer 2

SELECT DISTINCT ID, ConditionId 
FROM Table 
WHERE ConditionId=1 
    AND ID NOT IN (SELECT ID FROM Table WHERE NOT ConditionId = 1) 

Answer 3

我會傾向於做：

select id 
from t 
group by id 
having max(ConditionId) = min(ConditionId) and max(ConditionId) = 1; 

Answer 4

假設你只有在數據0和1，這應該工作：

select id 
from t 
group by id 
having min(ConditionId) = 1; 

Answer 5

select id 
    from t 
    group by id 
    having sum(abs(1-ConditionId)) = 0; 

或

select distinct id from t 
minus 
select distinct id from t where ConditionId <> 1;