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好吧,所以我需要在我的表中計算「resource_ID」發生少於3次的次數,然後將資源描述從另一個表中鏈接起來。ORACLE SQL計數和加入問題
到目前爲止,我已經得到了
Select Resource_hire.Resource_ID, count(resource_ID) as Times_Used
from RESOURCE_HIRE
Group by resource_ID
HAVING COUNT(*)< 3;
但是當我添加
SELECT RESOURCE_INVENTORY.DESCRIPTION, RESOURCE_HIRE.RESOURCE_ID
FROM RESOURCE_HIRE, RESOURCE_INVENTORY
WHERE (RESOURCE_HIRE.RESOURCE_ID = RESOURCE_INVENTORY.R_ID)
INNER JOIN (Select Resource_hire.Resource_ID, count(resource_ID)
from RESOURCE_HIRE
Group by resource_ID
HAVING COUNT(*)< 3;)
我得到的SQL命令不能正確地結束
感謝