这是硬编码的，几乎没有灵活性。我的系统花了2分钟才能运行。但是可能会有所帮助，如果没有，抱歉。fnGenerate_Numbers是一个表函数，它返回参数范围内的整数。做到这一点的方法。
DECLARE @Max INT,
@Pens money,
@Dvds money,
@Pendrives money,
@Mouses money,
@Tvs money
SELECT @Max = 1000,
@Pens = 10,
@Dvds = 29,
@Pendrives = 45,
@Mouses = 12.5,
@Tvs = 49
;WITH Results AS
(
SELECT p.n pens, d.n dvds, pd.n pendrives, m.n mouses, t.n tvs, tot.cost
FROM fnGenerate_Numbers(0, @Max/@Pens) p -- Pens
CROSS JOIN fnGenerate_Numbers(0, @Max/@Dvds) d -- DVDs
CROSS JOIN fnGenerate_Numbers(0, @Max/@Pendrives) pd -- Pendrives
CROSS JOIN fnGenerate_Numbers(0, @Max/@Mouses) m -- Mouses
CROSS JOIN fnGenerate_Numbers(0, @Max/@Tvs) t -- Tvs
CROSS APPLY (SELECT p.n * @Pens + d.n * @Dvds + pd.n * + @Pendrives + m.n * @Mouses + t.n * @Tvs cost) tot
WHERE tot.cost < @Max
), MaxResults AS
(
SELECT
MAX(pens) pens,
dvds,
pendrives,
mouses,
tvs
FROM Results
GROUP BY
dvds,
pendrives,
mouses,
tvs
)
SELECT mr.*, r.cost FROM MaxResults mr
INNER JOIN Results r ON mr.pens = r.pens
AND mr.dvds = r.dvds
AND mr.pendrives = r.pendrives
AND mr.mouses = r.mouses
AND mr.tvs = r.tvs
ORDER BY cost
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