Question

找到拥有最多客户的区域（显示区域名称和 MAX（no_of_customers）

select c.Region,max(total) 
from (select c.Region,count(c.Cust_id) as total
    from cust_dimen c
    group by Region) as total;

但显示错误

SELECT region
FROM cust_dimen
GROUP BY region
HAVING COUNT(cust_id)=
    (SELECT MAX(t) FROM
        (SELECT region,COUNT(cust_id) AS t,count(Cust_id) as total
         FROM cust_dimen
         GROUP BY region) t1);

它显示区域，但我甚至需要计数

Answer 1

只需使用order by和limit：

select c.Region, count(*) as total
from cust_dimen c
group by Region
order by total desc
limit 1;

Answer 2

SELECT region, COUNT(DISTINCT cust_id) AS cnt
FROM cust_dimen
GROUP BY region
HAVING COUNT(DISTINCT cust_id) =
(SELECT MAX(cnt)
 FROM
 (SELECT region, COUNT(DISTINCT cust_id) AS cnt
  FROM cust_dimen
  GROUP BY region) sub)

你很接近 - 只需在你的select语句中添加计数。

Answer 3

Intentalo asi： SELECT区域，COUNT（cust_id）编号FROM cust_dimenGROUP BY区域ORDER BY编号DESC LIMIT 1

使用sql使用max和count

3 个答案: