GROUP BY+COUNT+SUM SQL

Question

Hi,
I have a table, it has 2 colunms, ( name,number)
name number
B1 7
B1 7
B1 28
B1 28
B1 28
B2 7
B2 28
B3 7
I want to see below
number
name sum 7sum 28sum
B1 5 2 3
B2 2 1 1
B3 . . .
CAN YOU HELP ME
THANK YOU VERY MUCH FOR HELP

Answer 1

Like this?
SQL> ed
Wrote file afiedt.buf
  1  with t as (select 'B1' as name, 7 as num from dual union all
  2             select 'B1', 7 from dual union all
  3             select 'B1', 28 from dual union all
  4             select 'B1', 28 from dual union all
  5             select 'B1', 28 from dual union all
  6             select 'B2', 7 from dual union all
  7             select 'B2', 28 from dual union all
  8             select 'B3', 7 from dual)
  9  --
10  -- end of test data - use query below
11  --
12  select name
13        ,count(*)
14        ,sum(decode(num,7,1,0)) as sum7
15        ,sum(decode(num,28,1,0)) as sum28
16  from t
17  group by name
18* order by 1
SQL> /
NA   COUNT(*)       SUM7      SUM28
B1          5          2          3
B2          2          1          1
B3          1          1          0