Question

I have a nested if statement in order to identify part_ID‘s that were sold below the proper unit price, for given price-break Qty (qb=qty break and up=unit price). The query works properly for most records, but around 30% of the records, the proper price field is null when it should be populated. I assume that there must be a bug in my query. I would be super grateful if somebody could debug. Ideally, you could give me the proper SQL for me to copy and paste.

SELECT tlsp.PART_ID, 
   IIf(IsNull([tlsp].[qb1]) 
           And [tlsp].[last_sell_prc_cstmr]<[tlsp].[last_sell_prc_cstmr],
       [tlsp].[last_sell_prc_cstmr],
       IIf([tlsp].[last_order_qty_by_cstmr]>=[tlsp].[qb1]
              And [tlsp].[last_order_qty_by_cstmr]<[tlsp].[qb2] 
              And [tlsp].[last_sell_prc_cstmr]<[tlsp].[up1],
           [tlsp].[up1],
           IIf([tlsp].[last_order_qty_by_cstmr]>=[tlsp].[qb2] 
                   And [tlsp].[last_order_qty_by_cstmr]<[tlsp].[qb3] 
                   And [tlsp].[last_sell_prc_cstmr]<[tlsp].[up2],
               [tlsp].[up2],
               IIf([tlsp].[last_order_qty_by_cstmr]>=[tlsp].[qb3] 
                       And [tlsp].[last_sell_prc_cstmr]<[tlsp].[up3],
                   [tlsp].[up3])))) AS [proper price]
FROM tblLastSellPriceToCustomer_tmp AS tlsp;

Answer 1

Looking at that, it seems like you are missing the last false part.

 IIf (arg, true part, false part)

Your statement:

SELECT t.PART_ID, 
       IIf(arg,true,
           IIf(arg,true,
               IIf(arg,true,
                   IIf(arg,true,MISSING FALSE)))) AS proper price
FROM tblLastSellPriceToCustomer_tmp AS tlsp;

I have marked the missing part ,MISSING FALSE.