python - 数据库查询条件有多个值时如何处理 where id in (, , ,)

- 日理万妓 2022-12-21 02:23 169阅读 0赞

这个问题困扰了好久, 没有在网上找到全一点的处理方法. 现在解决了, 记录一下处理的办法:

得到的结果如下图:  
![在这里插入图片描述][20201113161336225.png_pic_center]可以导入pandas, 用DataFrame绘表:

#ask customer to order food
    print("\n which kind of pizza would you like to order? Please input the index number of them."
          "\n (note: Please separate them with commas, like 1,2,3. When you have finished typing, press ' Enter '):")
    orderFood = list(map(int, input().split(',')))
    
    
    #show order information
    print("\n Food items you have ordered are as follows: \n")
    
    s1 = "select id,name,note,price from foodlist where id in (%s)" % ','.join(['%s'] * len(orderFood))
    cur.execute(s1,(orderFood))
    
    orderInfo = pd.DataFrame(list(cur.fetchall()),columns=["index number","name","note","price"])
    print(orderInfo)
    
    # calculate total cost
    s2 = "select price from foodlist where id in (%s)"%",".join(['%s']*len(orderFood))
    cur.execute(s2,orderFood)
    
    cost = []
    total = 0
    for i in cur.fetchall():
        cost += i
    for j in cost:
        total +=j
    
    print("\n The total cost of your order is:",total)

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NoYXJvbm1vbW8_size_16_color_FFFFFF_t_70_pic_center]  
可能我算订单总额的方法不是太好, 但是我试了其他方法都报错了, 如果大家有更好的方式, 希望可以告诉我, 谢谢~~~~

[20201113161336225.png_pic_center]: /images/20221120/e4c6516e65c6422583d052982f5b623a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0NoYXJvbm1vbW8_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/7d4e7ab51ea9417f8def3a3d459c6d48.png