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AskSQLTeam
Ask SQLTeam Question
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 Posted - 2001-09-03 : 20:40:15
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Gregor J. Rothfuss writes "i have a table with the following fields:stock-----idproduct_idlocation_idstocktype_idquantityi want to calculate the quantity of stock for each product at each location. stock type indicates if it is a stock addition or a stock reduction.the formula would look somewhat like this:quantity on stock for a product = sum(stock entries of this product with type = addition) - sum(stock entries of this product with type reduction)i want to display the results like this:product|location|#a loc1 23a loc2 14b loc1 9 i tried some approaches with grouping and subselects, but that led me nowhere.i think i could hack something together with vb, but i'd like this to scale, so i'd prefer a t-sql solution." |
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Calculating sums