table1
| id_product | id_category | price |
|---|---|---|
| 1 | 11 | 120.00 |
| 2 | 11 | 100.00 |
| 3 | 11 | 92.00 |
table2
| id_product | discount |
|---|---|
| 1 | 20 |
产品只有 id_product 是 1 的有 20%的折扣，求打完折后的最低的价格
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2 replies • 2022-10-14 20:48:47 +08:00
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1
andrew2558 Oct 14, 2022  2
```mssql
select t1.Id_product,t1.Id_category,t1.price as originprice, t2.discount, FORMAT(t1.price*((100-ISNULL( t2.discount,0))/(100*1.0)), 'N') as newprice from table1 t1 left join table2 t2 on t1.Id_product= t2.Id_product ``` Id_product Id_category originprice discount newprice 1 11 120.00 20 96.00 2 11 100.00 NULL 100.00 3 11 92.00 NULL 92.00 |
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2
rulai OP @andrew2558 感谢，我用的 mysql ，不过我参考学习下
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