如何获得每个数字的计数？

Question

我有一张这样的桌子

Name  Value
test  1
test  1
test  2
test  3

如何获得这样的东西？

Name 1  2  3
test 2  1  1

Answer 1

检查此

select 
  name,
  sum(IIF(Value=1, 1,0)) as c1,
  sum(IIF(Value=2, 1,0)) as c2,
  sum(IIF(Value=3, 1,0)) as c2
from t
group by name