哪裏把條件放入JOIN查詢？

Question

以下是我的查詢顯示分區，但我需要選擇所有數據的分區= nagpur

我的意思是，我想把條件放在我的查詢中。請建議我如何在下面的查詢中實現條件。

SELECT RES.PARTYNAME, RES.DISTRICT, COUNT(RES.CONSTITUENCY) AS VOTESCOUNT 
FROM voter_count RES 
JOIN 
    (SELECT CONSTITUENCY, MAX(VOTES) AS VOTES 
    FROM voter_count 
    GROUP BY CONSTITUENCY) MAXS 
USING (VOTES, CONSTITUENCY) 
GROUP BY PARTYNAME,DISTRICT 

Answer 1

下面的查詢嘗試

SELECT RES.PARTYNAME, RES.DISTRICT, COUNT(RES.CONSTITUENCY) AS VOTESCOUNT 
FROM voter_count RES 
JOIN 
    (SELECT CONSTITUENCY, MAX(VOTES) AS VOTES 
    FROM voter_count 
    GROUP BY CONSTITUENCY) MAXS 
USING (VOTES, CONSTITUENCY) 
WHERE RES.DISTRICT = 'nagpur' 
GROUP BY PARTYNAME, DISTRICT