create table in_detail(/*订单明细*/ det_no varchar(12) primary key not null, ind_no varchar(12),/*订单编号*/ com_no varchar(12),/*商品编号*/ det_unitprice float,/*单价*/ det_num int,/*订购数量*/ det_sumprice float,/*总价*/ foreign key (ind_no) references indent(ind_no), foreign key (com_no) references commodity(com_no) )
时间: 2024-04-07 21:29:49 浏览: 14
这是一个创建订单明细表的SQL语句,该表包含以下字段:
- det_no:订单明细编号,长度为12,主键,不允许为空。
- ind_no:订单编号,长度为12,允许为空,外键,参考订单表的ind_no字段。
- com_no:商品编号,长度为12,允许为空,外键,参考商品表的com_no字段。
- det_unitprice:商品单价,浮点数类型。
- det_num:订购数量,整数类型。
- det_sumprice:商品总价,浮点数类型。
其中,ind_no和com_no两个字段都是外键,分别参考了订单表和商品表的主键字段。这样设计可以提高数据的一致性和完整性。
相关问题
AssertionError: No labels found in D:/NOMALWORK/studying/biyesheji/NEU-DET/my_yolo_dataset/val/labels.\
This error indicates that there are no label files present in the specified directory "D:/NOMALWORK/studying/biyesheji/NEU-DET/my_yolo_dataset/val/labels".
To resolve this error, you need to make sure that the label files for your validation set are present in the correct directory. These label files should have the same name as the corresponding image files and have the extension ".txt".
If the label files are missing, you need to create them using a labeling tool and save them in the correct directory.
If the label files are present but in a different directory, you need to update the path in your code to point to the correct directory.
class `Det3DDataPreprocessor` in mmdet3d/models/data_preprocessors/data_preprocessor.py: type object argument after ** must be a mapping, not NoneType
这个错误通常是因为在函数调用时,使用了NoneType作为关键字参数的值。请检查你的代码,看看在哪个函数调用中使用了NoneType作为参数的值。你可以使用调试器逐步执行代码,以确定导致该错误的具体位置。另外,你还可以检查函数定义,确保所有参数都有默认值,并确认你没有在函数调用中传递过多或过少的参数。