Ý tôi là bạn hiểu rằng nếu stock > 1000
sau đó màu khác not green
.
SELECT Beer.Beer,
Beer.Brewery,
Beer.Style,
Beer.ABV,
Beer.Hops,
Beer.SRM,
Sum(BeerStock.Quantity) totalQuantity,
CASE WHEN Sum(BeerStock.Quantity) < 0 THEN ''
WHEN Sum(BeerStock.Quantity) BETWEEN 0 AND 999 THEN 'Red'
WHEN Sum(BeerStock.Quantity) BETWEEN 1000 AND 4999 THEN 'Yellow'
WHEN Sum(BeerStock.Quantity) BETWEEN 5000 AND 9999 THEN 'GREEN'
WHEN Sum(BeerStock.Quantity) >= 10000 THEN 'Another Color'
END
FROM Beer
INNER JOIN BeerStock
ON Beer.Beer = BeerStock.Beer
-- Where ..other conditions..
nhưng nếu bạn thực sự có ý đó,
SELECT Beer.Beer,
Beer.Brewery,
Beer.Style,
Beer.ABV,
Beer.Hops,
Beer.SRM,
Sum(BeerStock.Quantity) totalQuantity,
CASE WHEN Sum(BeerStock.Quantity) < 0 THEN ''
WHEN Sum(BeerStock.Quantity) BETWEEN 0 AND 999 THEN 'Red'
WHEN Sum(BeerStock.Quantity) BETWEEN 1000 AND 4999 THEN 'Yellow'
WHEN Sum(BeerStock.Quantity) >= 5000 THEN 'GREEN'
END
FROM Beer
INNER JOIN BeerStock
ON Beer.Beer = BeerStock.Beer
-- Where ..other conditions..
Một điều nữa, Bạn cũng cần sử dụng GROUP BY
nếu không, bạn sẽ chỉ trả về một bản ghi ngay cả khi bạn có các bản ghi khác nhau,
SELECT Beer.Beer,
Beer.Brewery,
Beer.Style,
Beer.ABV,
Beer.Hops,
Beer.SRM,
Sum(BeerStock.Quantity) totalQuantity,
CASE WHEN Sum(BeerStock.Quantity) < 0 THEN ''
WHEN Sum(BeerStock.Quantity) BETWEEN 0 AND 999 THEN 'Red'
WHEN Sum(BeerStock.Quantity) BETWEEN 1000 AND 4999 THEN 'Yellow'
WHEN Sum(BeerStock.Quantity) BETWEEN 5000 AND 9999 THEN 'GREEN'
WHEN Sum(BeerStock.Quantity) >= 10000 THEN 'Another Color'
END
FROM Beer
INNER JOIN BeerStock
ON Beer.Beer = BeerStock.Beer
-- Where ..other conditions..
GROUP BY Beer.Beer,
Beer.Brewery,
Beer.Style,
Beer.ABV,
Beer.Hops,
Beer.SRM