Get records which were not updated the day before

Question

I need to get a list of items which were not updated the day before.

I currently have...

 SELECT     dbo.aboProducts.asin, dbo.aboProducts.sku
 FROM       dbo.aboProducts INNER JOIN
            dbo.LowestPrices ON dbo.aboProducts.asin = dbo.LowestPrices.productAsin
 WHERE     (dbo.LowestPrices.priceDate <= DATEADD(day, - 1, GETDATE()))

This however returns nothing. If i change the <= to >= i get results from the last 24 hours. I just need to return any items which were NOT updated, and leave the ones that were updated alone.

Answer 1

That looks fine, assuming every Product has at least one entry in LowestPrices. Do you actually have any items that weren't updated?

Answer 2

try this:

SELECT     aboProducts.asin, aboProducts.sku
FROM       dbo.aboProducts 
where aboProducts.asin 
not in(
     select aboProducts.asin 
     FROM       dbo.aboProducts 
     INNER JOIN
                dbo.LowestPrices 
     ON aboProducts.asin = LowestPrices.productAsin
     WHERE     (LowestPrices.priceDate >= DATEADD(day, - 1, GETDATE()))
 )

Answer 3

Try this:

 SELECT     dbo.aboProducts.asin, dbo.aboProducts.sku
 FROM       dbo.aboProducts INNER JOIN
            dbo.LowestPrices ON dbo.aboProducts.asin = dbo.LowestPrices.productAsin
 WHERE     (dbo.LowestPrices.priceDate != DATEADD(day, - 1, GETDATE()))