SQL不同的问题

Question

我有一个这种格式的SQL表：

Screenname|realname|followers|tweet
bob       |jim     |5        |hi
bob       |jim     |20       |hello
tom       |joe     |15       |JOETHECAT
tim       |joe     |16       |TEST

我需要编写一个查询，显示每个唯一的屏幕名称及其实名和跟随者的总数。

Screename realname followers
bob       jim      25
tom       joe      15
tim       joe      16

Answer 1

按Screename，realname和SUM关注者使用GROUP BY。

select Screename, realname, sum(followers) as followers
from your_table
group by Screename, realname 

Answer 2

尝试一下：

group

Answer 3

使用group by

很简单

select Screename, realname, sum(followers) as followers
from your_table
group by Screename, realname