我有一个数据集,但示例数据如下图所示:
Country Date Category X Y
IN 2011-11-22 B 1 0
BA 2010-11-23 B 11 0.2
IN 2011-11-22 A 1 0
BA 2011-11-23 A 1 1
IN 2011-07-28 A 1 0
想要将其转换为:输出
Country Date B_X B_Y A_X A_Y
IN 2011-11-22 1 0 1 0
BA 2010-11-23 11 0.2 1 1
IN 2011-07-28 0 0 1 0
我已经尝试过使用case了,但是它没有给我想要的输出,任何人都可以帮忙!
答案 0 :(得分:5)
我认为您只想按country
/ date
进行汇总并使用条件汇总:
select country, date,
sum(case when category = 'B' then x end) as x_b,
sum(case when category = 'B' then y end) as y_b,
sum(case when category = 'A' then x end) as x_a,
sum(case when category = 'A' then y end) as y_a
from t
group by country, date;