Hive脚本，带有SUM的DISTINCT

Question

我试图区分，然后找到一个球员在任何一个赛季和他参加过的球队数量的球队数。这让我沮丧，当然我有一个样本低于（第二）一。第一个是我失败的尝试

SELECT o.id,o.year,COUNT(DISTINCT(o.team)) b JOIN
(SELECT id, year, team FROM batting
GROUP BY id,year,team
ORDER BY id DESC
LIMIT 25) o 
0.id =b.id;



SELECT id, year, team FROM batting
GROUP BY id,year,team
ORDER BY id DESC
LIMIT 25;

产生

IGNORE ^ A，我认为它们代表空格或逗号，只是列seperatpr

Answer 1

获取每个玩家每年的团队数量，并按计数desc订购，获得1行

SELECT id, year, COUNT(DISTINCT(team)) FROM batting
GROUP BY id,year
ORDER BY COUNT(DISTINCT(team)) DESC
LIMIT 1;