Question

输入

+-------+---------+----------+
| Name  | Country | State    |
+-------+---------+----------+
| jon   | US      | Chicago  |
+-------+---------+----------+
| kathy | US      | CA       |
+-------+---------+----------+
| linda | US      | LA       |
+-------+---------+----------+
| harry | UK      | wales    |
+-------+---------+----------+
| steve | UK      | scotland |
+-------+---------+----------+
| ram   | India   | ap       |
+-------+---------+----------+
| jai   | India   | ka       |
+-------+---------+----------+
| raju  | India   | ap       |
+-------+---------+----------+
| ravi  | India   | mp       |
+-------+---------+----------+

因为它返回2（country＆amp; count）值，因此无法使用以下查询通过具有最高计数（印度）的国家/地区。请纠正我。

select name from table a 
where a.country in 
(SELECT country, COUNT(*) as c FROM table b 
GROUP BY country 
ORDER BY c DESC LIMIT 1);

输出：

应显示其数量在同一张表中最高的州（在最高统计的国家 - 印度之下）的详细信息。

+---------+-------+----+
| ram     | india | ap |
+---------+-------+----+
| raju    | india | ap |
+---------+-------+----+

Answer 1

试试这个

select * from table e
where e.state in
(select d.state from table a 
where a.country in 
(SELECT country  FROM table b 
 GROUP BY country 
 ORDER BY count(*) DESC LIMIT 1);
 GROUP BY state 
 ORDER BY count(*) DESC LIMIT 1);

Answer 2

SELECT country，COUNT（*）as c FROM table b GROUP BY国家 ORDER BY c DESC LIMIT 1;

更新：这应该有效

select state,count(*) c2 from a t1
INNER JOIN (
SELECT country, COUNT(*) as c FROM a t1 GROUP BY country ORDER BY c DESC LIMIT 1) t2 on t1.country = t2.country
GROUP BY state ORDER BY c2 DESC LIMIT 1

Answer 3

SELECT c.name,c.country,c.state,
FROM table c
INNER JOIN (SELECT a.country,a.state,count(*) statecount
            FROM table a 
            INNER JOIN (SELECT b.country, COUNT(*) as countrycount
                        FROM table b 
                        GROUP BY b.country 
                        ORDER BY countrycount DESC LIMIT 1) b ON a.country = b.country
            GROUP BY a.country,a.state
            ORDER BY a.statecount DESC LIMIT 1) d ON c.country = d.country
                                                  AND c.state = d.state

Answer 4

我在sql server中尝试过，该语句对我有用：

select * from [table] a 
where a.country in 
(SELECT top 1 country FROM [table] b 
GROUP BY country 
ORDER BY  COUNT(*) DESC)

我猜你使用Postgre或somthing similer，所以试试这个：

select * from [table] a 
where a.country in 
(SELECT country FROM [table] b 
GROUP BY country 
ORDER BY  COUNT(*) DESC LIMIT 1)

如果您告诉我SQL语言类型，我将能够为您提供确切的查询

Answer 5

这是mssql Query你可以根据你的转换。

select top 1 unitid as n, count (*) as co from npcstatus where unitid is not null Group by unitid having count (*)>1 order by co desc

此查询将为您提供最多出现的unitid。

您可以随意修改。

子查询以获取最高值

5 个答案: