mysql - JOIN 查询中的条件放在哪里？

Question

下面是我显示地区的查询，但我需要选择地区 = nagpur 的所有数据

我的意思是，我想在查询中添加 where 条件。请建议我如何实现下面查询中的 where 条件。

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

尝试以下查询

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