ms access - How to handle duplicate values -


i have table 100k plus items. need create table "best prices"

most items have unique supplier, can sourced 2 or 3 different suppliers have same manufacturer part number [mpn].

to find duplicate values have used:

in (select [mpn] [main data] tmp group [mpn] having count(*)>1 )

how handle duplicate records? each duplicated [mpn] want select record both in stock , has lowest price?

table has fields: [ean], [mpn], [inventory number] - field has unique supplier suffix, [name], [cost], [quantity]

thank in advanced!

i try this:

select m1.mpn, m1.[name], m2.qty, max(m1.cost) maxcost, min(m1.cost) mincost [main data] m1 inner join (select [mpn], sum(1) qty [main data] group [mpn] having count(*)>1 ) m2    on m1.mpn = m2.mpn group m1.mpn, m1.[name]

this give quantity in stock , highest price, lowest price each item. feel free remove other fields if find them useless.


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