Query for required out put as mention below in SQL

Question

HAI..
all
I HAVE A TABLES LIKE
SQL> SELECT *FROM A;
PCK PN
1 BIKES
2 COMPONENTS
SQL> SELECT *FROM B;
PSC PCK SBNAME
1 1 RASEBAIKE
2 1 SPEEDBIKE
3 2 MOTHERBORD
4 2 HARDIDSK
5 1 SPORTSBIKE
6 2 RAM
SQL> SELECT PN,SBNAME,COUNT(*) FROM A,B WHERE A.PCK=B.PCK GROUP BY ROLLUP(PN,SBNAME);
PN SBNAME COUNT(*)
BIKES RASEBAIKE 1
BIKES SPEEDBIKE 1
BIKES SPORTSBIKE 1
BIKES 3
COMPONENTS RAM 1
COMPONENTS HARDIDSK 1
COMPONENTS MOTHERBORD 1
COMPONENTS 3
6
I want output like this how to avoid duplicates in PN column in SQL
OUTPUT
1 BIKES
1 RASEBAIKE
2 SPEEDBIKE
5 SPORTSBIKE
2 COMPONENTS
3 MOTHERBORD
4 HARDIDSK
6 RAM

Answer 1

Kindly place \ before and after your data and code \try this
with a as
  select 1 pck, 'BIKES' pn from dual union
  select 2, 'COMPONENTS' from dual
, b as
  select 1 psc, 1 pck, 'RASEBAIKE' sbname from dual union
  select 2, 1, 'SPEEDBIKE' from dual union
  select 3, 2, 'MOTHERBORD' from dual union
  select 4, 2, 'HARDIDSK' from dual union
  select 5, 1, 'SPORTSBIKE' from dual union
  select 6, 2, 'RAM' from dual
select case
            when nvl(a.pn, 'ALL') = lead(a.pn) over (partition by a.pn order by a.pn) then
              null
            else
              nvl(a.pn, 'ALL')
       end pn
      ,b.sbname
      ,count(*)
from a, b
where a.pck = b.pck
group by rollup(a.pn, b.sbname)
PN         SBNAME       COUNT(*)
           RASEBAIKE           1
           SPEEDBIKE           1
           SPORTSBIKE          1
BIKES                          3
           HARDIDSK            1
           MOTHERBORD          1
           RAM                 1
COMPONENTS                     3
ALL                            6if you want the output as follows:
PN         SBNAME       COUNT(*)
BIKES      RASEBAIKE           1
           SPEEDBIKE           1
           SPORTSBIKE          1
                               3
COMPONENTS HARDIDSK            1
           MOTHERBORD          1
           RAM                 1
                               3
ALL                            6then simply modify LEAD to LAG