#TigerGraph Import : one csv for each relation type?

Question

I’ve just started using TigerGraph, and I saw in the import example that the edges files: friendship.csv is separated from the vertices files: person.csv.

Does it mean that if I have, say, 10 edges types I need or it would be better, to have 10 distinct csv files, each for a specific edge type ?

Answer 1

It's generally easier, but NOT necessary to have separate files for your edges.

For relationships where edges are one to one, you can get away with using the same file for data and relationships.

Example with 'Person' being a vertex with attribute 'name'. 'friend' is an edge connecting two 'Persons':

Person ID	Name	Friend
person_1	Bill	person_7
person_2	Sue	person_9
person_3	Ann	person_8

If your relationships are one to many, it may make sense to have a separate file for each relationship to prevent data duplication. For example, you could either use a single file with duplication like this:

Person ID	Name	Friend
person_1	Bill	person_7
person_1	Bill	person_6
person_2	Sue	person_9
person_2	Sue	person_5

Or a separate data and edge file like here:

Data:

Person ID	Name
person_1	Bill
person_2	Sue
person_3	Ann

Edges:

Person ID	Friend
person_1	person_7
person_1	person_6
person_2	person_9
person_2	person_5