我有一个StudentName,GPA,Semester
的视图 Name GPA Semester
x 3.15 1
x 2.89 2
y 3.87 1
y 4.0 2
我想像这样修改
Name semester1 GPA semester 2 GPA
x 3.15 2.89
y 3.87 4.0
Any help would be appreciated.
Thanks
答案 0 :(得分:3)
使用条件聚合:
select Name,
max(case when Semester = 1 then GPA end) AS "semester1 GPA",
max(case when Semester = 2 then GPA end) AS "semester3 GPA"
from table t
where Semester in (1, 2)
group by Name;