Grouping result set by a column in a query without aggregate function

Question

In the below result set, several columns appear for one table.
col data_Type format a12
col column_name format a10
set lines 100
set pages 50
SELECT table_name, column_name FROM user_tab_cols WHERE char_used = 'B'
AND TABLE_name NOT LIKE 'BIN%' ORDER BY TABLE_NAME;
TABLE_NAME                     COLUMN_NAM
BONUS                          JOB
BONUS                          ENAME
DEPT                           DNAME
DEPT                           LOC
EMP                            JOB
EMP                            ENAME
EMP_DTL                        ENAME
EMP_DTL                        LOC
EMP_DTL                        CONVN_LOC
MEMBER                         GENDER
MEMBER                         TEAM
MEMBER                         MEMBERTYPE
MEMBER                         FIRSTNAME
MEMBER                         LASTNAME
MEMBER                         PHONE
ORDERS                         STATUS
SYS_CONFIG                     CODE_ID
SYS_CONFIG                     FLAG_A
TOURNAMENT                     TOURTYPE
TOURNAMENT                     TOURNAMEI don't want the table_name to repeat for every columns within a table_name group. If i use SQLPLUS's BREAK command, it would
suppress duplicates
break on table_nameand the resultset would look like
TABLE_NAME                     COLUMN_NAM
BONUS                          JOB
                               ENAME
DEPT                           DNAME
                               LOC
EMP                            JOB
                               ENAME
EMP_DTL                        ENAME
                               LOC
                               CONVN_LOC
MEMBER                         GENDER
                               TEAM
                               MEMBERTYPE
                               FIRSTNAME
                               LASTNAME
                               PHONE
ORDERS                         STATUS
SYS_CONFIG                     CODE_ID
                               FLAG_A
TOURNAMENT                     TOURTYPE
                               TOURNAME
TYPE                           TYPE
X                              ENAME
Y                              ENAMEBut how can i do this using oracle SQL?

Answer 1

Analytics?
SQL> with t as
  2  (
  3  select 'A' col1, 100 col2 from dual
  4  union all
  5  select 'A' col1, 200 col2 from dual
  6  union all
  7  select 'B' col1, 800 col2 from dual
  8  union all
  9  select 'B' col1, 400 col2 from dual
10  union all
11  select 'C' col1, 500 col2 from dual
12  )
13  select decode(row_number() over (partition by col1 order by col2), 1, col1, null) col1
14         ,col2
15  from t
16  /
C      COL2
A    100.00
     200.00
B    400.00
     800.00
C    500.00
SQL>Cheers
Sarma.