TABLE NAME::NEWSALES
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NID |BRAND | QUANTITY | PRICE | TOTAL |
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1 | D&G | 50 | 2250.0 | 112500 |
2 | GUCCI | 40 | 2150.5 | 86020 |
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TABLE ::索多特
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SID |BRAND| SOLD | PRICE | TOTAL | REMAINING QUANTITY |
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10 | D&G | 20 | 900 | 180000 | ? |
11 | GUCCI | 10 | 5375 | 53750 | ? |
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//我需要减去QUANTITY-SOLD = REMAINING QUANTITY //示例::如果我们从NEWSALES表中将'quantity'视为50，并从SOLDOUT表中将'sold'视为20 然后它应该给'50 -20 = 30'（剩余数量）