Pivot table problem

Question

create table mytable
name varchar2(50),
surname varchar2(50)
insert table mytable values('mary','john')
insert table mytable values('mary','baby')
insert table mytable values('mary','lady')
insert table mytable values('sean','kate')
insert table mytable values('sean','terry')
insert table mytable values('kate','tom')
insert table mytable values('kate','lary')
my query result is
name    surname
mary john
mary baby
mary lady
sean kate
sean terry
kate tom
kate lary
i want like this
mary   sean     kate
john kate tom
baby terry lary
lady
this is not the all data.
the data is changable.there are 3 name like john 2 name like sean 2 name lik kate and there will be 5 name like paul....i want name like column and surname like data..
thanks for your helps....

Answer 1

Hi,
Try this:
WITH     number_rows     AS
     SELECT     name
     ,     surname
     ,     ROW_NUMBER () OVER
               (     PARTITION BY     name
                    ORDER BY     surname
               )     AS r_num
     FROM     mytable
SELECT     r_num
,     MAX (CASE WHEN name = 'mary'     THEN surname END)     AS mary
,     MAX (CASE WHEN name = 'sean'     THEN surname END)     AS sean
,     MAX (CASE WHEN name = 'kate'     THEN surname END)     AS kate
FROM     number_rows
GROUP BY     r_num
ORDER BY     r_num;The output isn't quite what you requested:
.    R_NUM MARY       SEAN       KATE
         1 baby       kate       lary
         2 jon        terry      tom
         3 ladyYou don't have to display r_num: I showed it just to make things easier to understand.
If the output should really include 'john' rather than 'jon', and/or if it needs to appear above 'baby' rather than below it, then please explain.
If the names in the columns ('mary', 'sean' and 'kate' in your sample data) need to be determined at run-time, then you need dynamic SQL to generate a statement like the one above.
The script below shows one way of doing that in SQL*Plus.
How to Pivot a Table with a Dynamic Number of Columns
This works in any version of Oracle
The "SELECT ... PIVOT" feature introduced in Oracle 11
is much better for producing XML output.
Say you want to make a cross-tab output of
the scott.emp table.
Each row will represent a department.
There will be a separate column for each job.
Each cell will contain the number of employees in
     a specific department having a specific job.
The exact same solution must work with any number
of departments and columns.
(Within reason: there's no guarantee this will work if you
want 2000 columns.)
Case 0 "Basic Pivot" shows how you might hard-code three
job types, which is exactly what you DON'T want to do.
Case 1 "Dynamic Pivot" shows how get the right results
dynamically, using SQL*Plus. 
(This can be easily adapted to PL/SQL or other tools.)
PROMPT     ==========  0. Basic Pivot  ==========
SELECT     deptno
,     COUNT (CASE WHEN job = 'ANALYST' THEN 1 END)     AS analyst_cnt
,     COUNT (CASE WHEN job = 'CLERK'   THEN 1 END)     AS clerk_cnt
,     COUNT (CASE WHEN job = 'MANAGER' THEN 1 END)     AS manager_cnt
FROM     scott.emp
WHERE     job     IN ('ANALYST', 'CLERK', 'MANAGER')
GROUP BY     deptno
ORDER BY     deptno
PROMPT     ==========  1. Dynamic Pivot  ==========
--     *****  Start of dynamic_pivot.sql  *****
-- Suppress SQL*Plus features that interfere with raw output
SET     FEEDBACK     OFF
SET     PAGESIZE     0
SPOOL     p:\sql\cookbook\dynamic_pivot_subscript.sql
SELECT     DISTINCT
     ',     COUNT (CASE WHEN job = '''
||     job
||     ''' '     AS txt1
,     'THEN 1 END)     AS '
||     job
||     '_CNT'     AS txt2
FROM     scott.emp
ORDER BY     txt1;
SPOOL     OFF
-- Restore SQL*Plus features suppressed earlier
SET     FEEDBACK     ON
SET     PAGESIZE     50
SPOOL     p:\sql\cookbook\dynamic_pivot.lst
SELECT     deptno
@@dynamic_pivot_subscript
FROM     scott.emp
GROUP BY     deptno
ORDER BY     deptno
SPOOL     OFF
--     *****  End of dynamic_pivot.sql  *****
EXPLANATION:
The basic pivot assumes you know the number of distinct jobs,
and the name of each one.  If you do, then writing a pivot query
is simply a matter of writing the correct number of ", COUNT ... AS ..."\
lines, with the name entered in two places on each one.  That is easily
done by a preliminary query, which uses SPOOL to write a sub-script
(called dynamic_pivot_subscript.sql in this example).
The main script invokes this sub-script at the proper point.
In practice, .SQL scripts usually contain one or more complete
statements, but there's nothing that says they have to.
This one contains just a fragment from the middle of a SELECT statement.
Before creating the sub-script, turn off SQL*Plus features that are
designed to help humans read the output (such as headings and
feedback messages like "7 rows selected.", since we do not want these
to appear in the sub-script.
Turn these features on again before running the main query.
*/