Quick Question about Transposing/Crosstab SQL or PL/SQL query Version II

Question

Hi All,
2nd time I'm asking this but a little different
Looking for how to transpose rows into column in SQL and/or PLSQL but use the transpose into column headings.
I've got thousands of rows in the format
phone_no Code
4161231234 A
4161231234 B
6471231234 A
6471231234 C
6471231234 D
need to transpose this to
phone_no A B C D
4161231234 Y Y N N
6471231234 Y N Y Y
New Records such as
6471231234 E would be appending later therefore the max number of codes for phone_no is dynamic
Would appreciate if anybody gave guidance or direction.
Cheers,

Answer 1

Hi,
If the number of columns is unknown, but within a known bound, then you can do something like this:
WITH     got_jnum    AS
     SELECT       deptno
     ,       job
     ,       sal
     ,       DENSE_RANK () OVER (ORDER BY job)     AS jnum
     FROM       scott.emp
SELECT       deptno
,       TO_CHAR (SUM (CASE WHEN jnum = 1 THEN sal END), '99999999')     AS job_1
,       TO_CHAR (SUM (CASE WHEN jnum = 2 THEN sal END), '99999999')     AS job_2
,       TO_CHAR (SUM (CASE WHEN jnum = 3 THEN sal END), '99999999')     AS job_3
,       TO_CHAR (SUM (CASE WHEN jnum = 4 THEN sal END), '99999999')     AS job_4
FROM       got_jnum
GROUP BY  deptno
    UNION ALL
SELECT       NULL                                   AS deptno
,       MIN (CASE WHEN jnum = 1 THEN LPAD (job, 9) END)     AS job_1
,       MIN (CASE WHEN jnum = 2 THEN LPAD (job, 9) END)     AS job_2
,       MIN (CASE WHEN jnum = 3 THEN LPAD (job, 9) END)     AS job_3
,       MIN (CASE WHEN jnum = 4 THEN LPAD (job, 9) END)     AS job_4
FROM       got_jnum
ORDER BY  deptno     NULLS FIRST
;Output:
.    DEPTNO JOB_1     JOB_2     JOB_3     JOB_4
             ANALYST     CLERK   MANAGER PRESIDENT
        10                1300      2450      5000
        20      6000      1900      2975
        30                 950      2850See [this thread|http://forums.oracle.com/forums/thread.jspa?messageID=4051662&#4051662] for context.
As mentioned there, String Aggregation is another possibility.
If the number of columns is completely unknown, then I see your options as:
(1) String Aggregation
(2) Dynamic SQL
(3) Wrapping (See [this thread|http://forums.oracle.com/forums/thread.jspa?messageID=3527823])