Question

username  skill      mark

x          writing   10
x          reading   11

a          writing   15
a         reading    14

我希望得到这样的o / p：

x       10   11
y       15  14

Answer 1

条件聚合是要走的路：

SELECT t.username,
       MAX(CASE WHEN t.skill = 'writing' THEN t.mark END) as writing_mark,
       MAX(CASE WHEN t.skill = 'reading' THEN t.mark END) as reading_mark
FROM YourTable t
GROUP BY t.username

Answer 2

select username,skill,mark from Your_table;#this fetches only 3

Or 

select * from Your_table; #this will fetch all fields of your table

sql查询将用户数据放在一行中

2 个答案: