Question

我有2个班级，1个用于药品，另一个用于月度交易。药物结构：

Create class Medicines extends V
Create property Medicines.medicine_id integer
Create property Medicines.medicine_Brand integer
Create property Medicines.medicine_Code String

每月转化的结构：

Create class Transactions extends V
Create property Transactions.transaction_id integer
Create property Transactions.transaction_Date Date
Create property Transactions. transaction _medicine_id Integer

现在，我希望创建一个边缘，来自＆＃34; Transactions.transaction _medicine_id＆＃34; to＆＃34; Medicines.medicine_Code＆＃34; 。如果是RDBMS，我会在“事务”之间建立关系。 transaction _medicine_Code“AND”Medicines.medicine_id“但是在图形数据库中我们不能创建字段之间的关系，所以我应该如何在这些字段之间创建边缘。

药物：

----+-----+---------+-----------+-------------
#   |@RID |@CLASS   |medicine_id|medicine_Code
----+-----+---------+-----------+-------------
0   |#15:0|Medicines|1          |abc
1   |#15:1|Medicines|2          |xyz
----+-----+---------+-----------+-------------

交易：

----+-----+------------+--------------+-------------------+-----------------------
#   |@RID |@CLASS      |transaction_id|transaction_Date   |transaction_medicine_id
----+-----+------------+--------------+-------------------+-----------------------
0   |#16:0|Transactions|1             |2016-01-12 00:00:00|1
1   |#16:1|Transactions|2             |2016-01-12 00:00:00|2
----+-----+------------+--------------+-------------------+---------------------

-

我想要的是像

这样的输出

----+-----+------------+--------------+-------------------+-----------------------
#   |@RID |@CLASS      |transaction_id|transaction_Date   |transaction_medicine_Code|
----+-----+------------+--------------+-------------------+-----------------------
0   |#16:0|Transactions|1             |2016-01-12 00:00:00|abc
1   |#16:1|Transactions|2             |2016-01-12 00:00:00|xyz
----+-----+------------+--------------+-------------------+---------------------

-

Answer 1

在我看来，你需要考虑更多的图形数据库导向，所以删除外键并建立关系创建边缘b / w药物rids和交易rids。

-----------         sell          --------------
|Medicines|  ----------------->   |Transactions|
-----------                       --------------


Create class Medicines extends V
Create property Medicines.medicine_Brand String
Create property Medicines.medicine_Code Integer

Create class Transactions extends V
Create property Transactions.transaction_id integer
Create property Transactions.transaction_Date Date


Create class sell extends E

然后获取请求的输出：

SELECT transaction_id, transaction_Date, in('sell').medicine_Code FROM Transactions

Orient DB - 创建动态边缘

1 个答案: