Need Query to Calcute number of Polygins

Question

Hi All,
I have a problem trying to figure out solve the below problem :
I have one table which contains informations about lot nos. The table is as below : TABLE A
PROJECT_ID MKTS_IND MKTS_NO LOT_NO
14223 MK 17 00102X
15213 MK 17 00102X
47299 MK 17 00102X
46911 MK 25 98095N
2446 MK 25 98095N
I have another table which has all the polygons which a project belongs to as below : TABLE B
PROJECT_ID POLYGON_ID
2446 MK25B156
14223 MK17B426
15213 MK17C016
46911 MK25B157
47299 MK17B424
The first requirement is to get all the LOT NO which are having more than one polygon ,
e.g
From Table A MKTS_IND+MKTS_NO+'-'+LOT_NO(=MK17-00102X) should be selected if it is in TABLE B with more than one POLYGON_ID. ( Note . More than one project id need not mean it is in multiple POLYGON_ID )
Now the more complex part .
I have another table which is as below : TABLE C
PARENT_LOT_NO CHILD_LOT_NO
MK02-01368N MK02-02431N
MK02-01369X MK02-02902A
MK02-01370K MK02-02892A
We need to match from TABLE A MKTS_IND+MKTS_NO+'-'+LOT_NO(=MK17-00102X) with the CHILD_LOT_NO and get the PARENT_LOT_NO and using this parent lot no we need to count the number of polygons that this parent lot number belongs. There can be many parent lot numbers for this.
For each parent lot no found we need to go back again in TABLE C and match with the CHILD_LOT_NO and loop through the parent lot no to count the number of polygons for each parent .
As an example :
Lets say i have MK17-00102X from TABLE A . I will select the PARENT_LOT_NO from TABLE C where CHILD_LOT_NO=MK17-00102X.
Loop through ALL the Parent Lot Nos found . Lets say I found two parent lot numbers for this : MK17-1111A AND MK17-1111B
I will need to calculate the number of polygons for MK17-1111A and MK17-1111B .
I will then need to go to TABLE C and get PARENT LOT NO's for MK17-1111A and MK17-1111B and calculate the number of polygon for these new parent lot numbers.
Please let me know if there is any easy way to do the job or we need to write PL/SQL procedure for this.
I have tried to make the requirement as clear as possible.
Thanks for your time and effort on this..
Regards
Ravinder
Edited by: user10934487 on Jul 4, 2010 9:12 PM
Edited by: user10934487 on Jul 4, 2010 9:21 PM

Answer 1

Hi, Ravinder,
Whenever you have a question, please post CREATE TABLE and INSERT statements for a little sample data, and the results you want from that data. Without that, it's hard to understnd what you want, and impossible to test solutions.
If you want a solution that works in your version of Oracle, then say what version that is.
I think this is what you want fro the first problem:
SELECT       a.mkts_ind,  a.mkts_no,  a.lot_no
FROM       a
JOIN       b     ON     a.mkts_ind ||
               a.mkts_no  ||
               '-'        ||
               a.lot_no     = b.polygon_id
GROUP BY  a.mkts_ind,  a.mkts_no,  a.lot_no
HAVING       COUNT (b.polygon_id)     > 1
ORDER BY  a.mkts_ind,  a.mkts_no,  a.lot_no
;For the second (more complex) problem, I think you want a CONNECT BY query. I don't think you need PL/SQL, but without the exact data and results, I'm just guessing.