Question

SQL Rows Contain Duplicates

Asked by: r270ba

I have a query that I know why the rows are returning duplicates.  I just can't figure out how to do my joins so that they will not.  If you notice in the query and results below, the Received Unit Cost and Purchase Unit Cost are repeated.  Any help to fix this is appreciated.  The results should just return 3 rows.

*Query and Results below*

======QUERY=======
select a.po_number, c.poptype, po_date, vendor_id, vendor_name, d.itemnmbr, d.itemdesc, d.qtyorder, b.unitcost as 'Received Unit Cost', d.unitcost as 'Purchase Unit Cost',c.user2ent from tspvpurchaseorder a
join pop30310 b
on a.po_number=b.ponumber
join pop30300 c
on b.poprctnm=c.poprctnm
join pop10110 d
on a.po_number=d.ponumber
where a.po_number='p016374'
======QUERY======= 
======RESULTS======
P016374          	3	2009-10-06 00:00:00.000	S&R01          	DK50SE HST.RAB                 	Kioti 49HP, Diesel 4WD w/Turf Tires                                                                  	2.00000	20404.77000	17657.80000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	KB2485.RAB                     	Kioti Backhoe                                                                                        	1.00000	20404.77000	5611.92000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	KL401.RAB                      	Kioti Front End Loader                                                                               	1.00000	20404.77000	3603.60000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	DK50SE HST.RAB                 	Kioti 49HP, Diesel 4WD w/Turf Tires                                                                  	2.00000	6470.25000	17657.80000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	KB2485.RAB                     	Kioti Backhoe                                                                                        	1.00000	6470.25000	5611.92000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	KL401.RAB                      	Kioti Front End Loader                                                                               	1.00000	6470.25000	3603.60000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	DK50SE HST.RAB                 	Kioti 49HP, Diesel 4WD w/Turf Tires                                                                  	2.00000	5222.27000	17657.80000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	KB2485.RAB                     	Kioti Backhoe                                                                                        	1.00000	5222.27000	5611.92000	rwatson1       
P016374          	3	2009-10-06 00:00:00.000	S&R01          	KL401.RAB                      	Kioti Front End Loader                                                                               	1.00000	5222.27000	3603.60000	rwatson1         
======RESULTS======

                                  
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Asked On
2009-11-04 at 12:18:35ID24872300
Topics

SQL Query Syntax

,

SQL Server 2005

Participating Experts
2
Points
500
Comments
6

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Answers

 

by: brejkPosted on 2009-11-04 at 12:43:23ID: 25743678

The rows are not the same. They differ by the values in two columns: b.unitcost as 'Received Unit Cost' and d.unitcost as 'Purchase Unit Cost'. You have to decide which value (for example MIN or MAX) you wish to return in those two columns for each combination of all other columns and then perform grouping by all other columns.

 

by: DanielWilsonPosted on 2009-11-04 at 12:43:58ID: 25743682

should be 3 rows instead of 9, right?

We're going to have to see all the fields in each of the tables to figure out which join criteria are missing.

Basically, it appears that you need to join on more criteria.
e.g. a join b on a.firstfield = b.firstfield and a.AnotherField = b.AnotherField

We just have to figure out which is the "AnotherField" that's needed!

 

by: r270baPosted on 2009-11-04 at 12:45:16ID: 25743695

YES!  The rows that need the extra join are the pop10110 and pop30310's itemnmbr field.  I just can't figure out where to join them.

 

by: DanielWilsonPosted on 2009-11-04 at 12:45:40ID: 25743699

An aggregation (possibly even a SUM) like brejk recommends is one option -- maybe the right one.

Otherwise, we're looking for a missing join criterion ... or two.

 

by: DanielWilsonPosted on 2009-11-04 at 12:47:02ID: 25743725

OK, try:

select a.po_number, c.poptype, po_date, vendor_id, vendor_name, d.itemnmbr, d.itemdesc, d.qtyorder, b.unitcost as 'Received Unit Cost', d.unitcost as 'Purchase Unit Cost',c.user2ent 
from tspvpurchaseorder a
join pop30310 b
on a.po_number=b.ponumber
join pop30300 c
on b.poprctnm=c.poprctnm
join pop10110 d
on a.po_number=d.ponumber
   AND a.itemnmbr = d.itemnmbr
where a.po_number='p016374'
                                              
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by: r270baPosted on 2009-11-04 at 12:52:02ID: 31650197

THANKS!!!  I knew it had to do with my joins but I just couldn't figure out where I needed to AND the itemnmbr.

20120131-EE-VQP-002

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