I was working on two databases which have the same nodes , each one was dedicated to a precise year. here is an example fo my database 2017 :
For 2018 , nodes will have 18 instead of 17 in the name of each node (as you can see in the screenshot).
To recognize them before combining both , I am adding a new property for each node in each year which will be (year : '2017') this is an example for nodes of 2017.
What I am looking for is how to combine both of them in just one database knowing that I have a backup of each year (I copied the folder "data of each one) , and we can find some data which are the same but they dont have the same property "year" .
So my question is : how can I combine both of them and get each two nodes in just one ? for example : I want to have Contrat1718 instead of a node for each year.