Please read question of carefully how to perform in SQLplus10g (dont give ans for 11g or previous release)

Question

There is table called department
Depno  Employee_id  salary
101         E12             1000
101         E13             1000
101         E14             3000
101         E15             5000
102         E16             4000
102         E17             2000
102         E18             1000
102         E19             4000
Now I want result like
Depno      Employee_id                salary
101             E12,E13,E14,E15                 10000
102             E16,E17,E18,E19                 11000
Tell the solution for 10 g SQLplus without creating function (no use of plsql) and also listagg function work in 11g (Need to solve query through sql statements)

Answer 1

SQL> select  *
  2    from  v$version
  3  /
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
PL/SQL Release 10.2.0.5.0 - Production
CORE    10.2.0.5.0      Production
TNS for 64-bit Windows: Version 10.2.0.5.0 - Production
NLSRTL Version 10.2.0.5.0 - Production
SQL> with sample_table as (
  2                        select 101 deptno,'E12' employee_id,1000 salary from dual union all
  3                        select 101,'E13',1000 from dual union all
  4                        select 101,'E14',3000 from dual union all
  5                        select 101,'E15',5000 from dual union all
  6                        select 102,'E16',4000 from dual union all
  7                        select 102,'E17',2000 from dual union all
  8                        select 102,'E18',1000 from dual union all
  9                        select 102,'E19',4000 from dual
10                       )
11  select  deptno,
12          rtrim(xmlagg(xmlelement(e,employee_id,',').extract('//text()') order by employee_id),',') employee_id,
13          sum(salary) salary
14    from  sample_table
15    group by deptno
16    order by deptno
17  /
    DEPTNO EMPLOYEE_ID                                  SALARY
       101 E12,E13,E14,E15                               10000
       102 E16,E17,E18,E19                               11000
SQL>
SY.