Dynamic display of columns in the pivot query

I have a table called STUDENT_SCORE. I need to display the avarage score/month for 2 years and the monthly score until today "month.

Then assume that it is April 2009. The report will look like

Roll_id 2007avg 2008avg Jan09-Mar09 Feb 09
101 80.9 70.9 89.7 90.9 56.8
102 70.9 23.9 87.2 90.0 76.8


I tried a bit, but can't fix the monthly score display dynamically.


DDL/DML is as below


create the table STUDENT_SCORE
(number of roll_id,
date of mth_id,
The partition number);


insert into STUDENT_SCORE values
(101, to_date (January 1, 2006 ', ' dd/mm/yyyy'), 67.5);
insert into STUDENT_SCORE values
(101, to_date (February 1, 2006 ', ' dd/mm/yyyy'), 77.5);
insert into STUDENT_SCORE values
(101, to_date (March 1, 2006 ', ' dd/mm/yyyy'), 87.5).
insert into STUDENT_SCORE values
(101, to_date (April 1, 2006 ', ' dd/mm/yyyy'), 27.5);
insert into STUDENT_SCORE values
(101, to_date (May 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (June 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (July 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (August 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (September 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (October 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (November 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (December 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (January 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (February 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (March 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (April 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (May 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (June 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (July 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (August 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (September 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (October 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (November 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (December 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (1 January 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (February 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (March 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (April 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (May 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (June 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (July 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (August 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (September 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (October 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (November 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (December 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(101, to_date (January 1, 2009 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (January 1, 2006 ', ' dd/mm/yyyy'), 67.5);
insert into STUDENT_SCORE values
(102, to_date (February 1, 2006 ', ' dd/mm/yyyy'), 77.5);
insert into STUDENT_SCORE values
(102, to_date (March 1, 2006 ', ' dd/mm/yyyy'), 87.5).
insert into STUDENT_SCORE values
(102, to_date (April 1, 2006 ', ' dd/mm/yyyy'), 27.5);
insert into STUDENT_SCORE values
(102, to_date (May 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (June 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (July 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (August 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (September 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (October 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (November 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (December 1, 2006 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (January 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (February 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (March 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (April 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (May 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (June 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (July 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (August 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (September 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (October 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (November 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (December 1, 2007 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (1 January 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (February 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (March 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (April 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (May 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (June 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (July 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (August 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (September 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (October 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (November 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (December 1, 2008 ', ' dd/mm/yyyy'), 57.5);
insert into STUDENT_SCORE values
(102, to_date (January 1, 2009 ', ' dd/mm/yyyy'), 57.5);

Hello

The script below produces what you want (as far as I can tell, without your desired results).

Student_score_smry subquery Gets the year and monthly averages of student_score.
It is completely static: it always produces 11 monthly columns (from January to November) and the names of columns hardcoded (m01 through m11).
For dynamic column names you need, I used SQL * COLUMN more orders.
To get the variable number of monthly columns you need, SELECT from the main query clause uses a script under (dynamic_month.sql) to only show the correct number (which can be 0).

The student_score_wk_smry of subquery retrieves the weekly averages of the student_score_wk.
He, too, is completely static: it always produces 6 weekly columns with names hardcoded (w1 through w6).

There are four preliminary motions, that write two scripts under:
Prelimiary C1, C2 and C3 queries write orders of COLUMN for annual, monthly and weekly columns in dynamic_columns.sql
Preliminary motion M written between 0 and 11 items in SELECT-clause in sub-script dynamic_month.sql

The main script is:

SET     FEEDBACK     OFF
SET     LINESIZE     200
SET     PAGESIZE     0
SET     VERIFY          OFF

SPOOL     dynamic_column.sql

-- Preliminary query C1: Columns for last 2 years
SELECT     'COLUMN     y'
     ||     LEVEL
     ||     '     HEADING     "'
     ||     TO_CHAR     ( ADD_MONTHS     ( &target_month
                         , 12 * (-3 + LEVEL)
                         )
               , 'YYYY'
               )
     ||     'avg"'
FROM     dual
CONNECT BY     LEVEL <= 2
;

-- Preliminary query C2: 11 prior months in this year
SELECT     'COLUMN     m'
     ||     TO_CHAR     (LEVEL, 'fm00')
     ||     '     HEADING     "'
     ||     TO_CHAR     ( ADD_MONTHS     ( TRUNC (&target_month, 'YYYY')
                         , LEVEL - 1
                         )
               , 'MonYY'
               )
     ||     '"'
FROM     dual
CONNECT BY     LEVEL <= 11
;

-- Preliminary query C3: 6 weeks before target_month
WITH     got_w_num     AS
(
     SELECT     SUBSTR (week_desc, 1, 6)     AS mon_dd
     ,     ROW_NUMBER () OVER
               (     ORDER BY     week_id     DESC
               )     AS w_num
     FROM     week
     WHERE     TO_DATE (week_desc, 'Mon DD, YYYY')     < &target_month
)
SELECT     'COLUMN     w'
     ||     TO_CHAR (7 - w_num)
     ||     '     HEADING     "Week of '
     ||     mon_dd
     ||     '"'
FROM     got_w_num
WHERE     w_num     <= 6
ORDER BY     w_num     DESC
;

SPOOL     OFF

-- Preliminary Query M: 0-11 months (in SELECT clause)
SPOOL     dynamic_month.sql

SELECT     ',     m'
     ||     TO_CHAR (LEVEL, 'fm00')
FROM     dual
WHERE     MONTHS_BETWEEN (&target_month, TRUNC (&target_month, 'YYYY')) >= 1
CONNECT BY     LEVEL <= MONTHS_BETWEEN (&target_month, TRUNC (&target_month, 'YYYY'))
;

SPOOL     OFF

-- Restore SQL*Plus features suppressed earlier
SET     FEEDBACK     ON
SET     LINESIZE     80
SET     PAGESIZE     50

-- COLUMN Commands
@dynamic_column.sql

-- Main Query
WITH     student_score_smry     AS
(
     SELECT     roll_id
     ,     AVG (CASE WHEN TRUNC (mth_id, 'YYYY') = TRUNC (ADD_MONTHS (&target_month, -24), 'YYYY')     THEN score END)     AS y1
     ,     AVG (CASE WHEN TRUNC (mth_id, 'YYYY') = TRUNC (ADD_MONTHS (&target_month, -12), 'YYYY')     THEN score END)     AS y2
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') =             TRUNC (&target_month, 'YYYY')      THEN score END)     AS m01
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  1) THEN score END)     AS m02
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  2) THEN score END)     AS m03
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  3) THEN score END)     AS m04
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  4) THEN score END)     AS m05
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  5) THEN score END)     AS m06
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  6) THEN score END)     AS m07
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  7) THEN score END)     AS m08
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  8) THEN score END)     AS m09
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'),  9) THEN score END)     AS m10
     ,     AVG (CASE WHEN TRUNC (mth_id, 'MM') = ADD_MONTHS (TRUNC (&target_month, 'YYYY'), 10) THEN score END)     AS m11
     FROM     student_score
     GROUP BY     roll_id
)
,     got_w_num     AS
(
     SELECT     week_id
     ,     ROW_NUMBER () OVER
               (     ORDER BY     week_id     DESC
               )     AS w_num
     FROM     week
     WHERE     TO_DATE (week_desc, 'Mon DD, YYYY')     < &target_month
)
,     student_score_wk_smry     AS
(
     SELECT     roll_id
     ,     AVG (CASE WHEN W_NUM = 6 THEN score END)     AS w1
     ,     AVG (CASE WHEN W_NUM = 5 THEN score END)     AS w2
     ,     AVG (CASE WHEN W_NUM = 4 THEN score END)     AS w3
     ,     AVG (CASE WHEN W_NUM = 3 THEN score END)     AS w4
     ,     AVG (CASE WHEN W_NUM = 2 THEN score END)     AS w5
     ,     AVG (CASE WHEN W_NUM = 1 THEN score END)     AS w6
     FROM     student_score_wk     s
     JOIN     got_w_num          w     ON     s.wk_id     = w.week_id
     WHERE     w_num     <= 6
     GROUP BY     roll_id
)
SELECT     NVL (ss.roll_id, ssw.roll_id)     AS roll_id
,     y1, y2
@dynamic_month.sql
,     w1, w2, w3, w4, w5, w6
FROM          student_score_smry     ss
FULL OUTER JOIN     student_score_wk_smry     ssw     ON     ss.roll_id     = ssw.roll_id
ORDER BY     roll_id
;

Sub-script dynamic_column.sql might look like this:

COLUMN     y1     HEADING     "2007avg"
COLUMN     y2     HEADING     "2008avg"
COLUMN     m01     HEADING     "Jan09"
COLUMN     m02     HEADING     "Feb09"
COLUMN     m03     HEADING     "Mar09"
COLUMN     m04     HEADING     "Apr09"
COLUMN     m05     HEADING     "May09"
COLUMN     m06     HEADING     "Jun09"
COLUMN     m07     HEADING     "Jul09"
COLUMN     m08     HEADING     "Aug09"
COLUMN     m09     HEADING     "Sep09"
COLUMN     m10     HEADING     "Oct09"
COLUMN     m11     HEADING     "Nov09"
COLUMN     w1     HEADING     "Week of Dec 21"
COLUMN     w2     HEADING     "Week of Dec 28"
COLUMN     w3     HEADING     "Week of Jan 04"
COLUMN     w4     HEADING     "Week of Jan 11"
COLUMN     w5     HEADING     "Week of Jan 18"
COLUMN     w6     HEADING     "Week of Jan 25"

Other sub-script, dynamic_month.sql, might look like this:

,     m01
,     m02
,     m03

Tags: Database

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