we have a table with products and a table with a current selection/assortment of products. Now need to join them create an export file by some .net code.
Curently using query like this:
SELECT * FROM ASSORTMENT a INNER JOIN PRODUCTS p on a.clientID = 38 and a.productID = p.productID ORDER BY a.ID_ROW OFFSET 100000 ROWS FETCH NEXT 1000 ROWS ONLY
Problem is that the assortment can contain discontinued products, that are not existing in produtcs table anymore, so need a join to verify. Also need each time exactly same amount of rows per select, e.g. 1000.
The query gets slower if the offset gets higher because it does a full join of products and assortment table each time. On 3 Million products and an assortment of 200.000 articles it takes multiple seconds to fetch next 1000 if the offset is over 50.0000
Is there a more efficient way of doing this?
SQL Server Version is 2014.
many thanks, Sven
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