Function dedup()
deduplicates rows of an alias and return the rows left. Those homologous aliases of the input alias will either be affected by the deduplication process when the function is called in a WITH clause, or not be affected when called in a RETURN clause.
Arguments:
- Alias <any>
Returns:
- Deduplicated value <any>
Sample graph: (to be used for the following examples)
![](https://img.ultipa.cn/draw/draw_060a6c5dfe884a59bce022892f28fa5f.jpg)
create().node_schema("professor").node_schema("student")
create().node_property(@*, "age", int32).node_property(@*, "email", string)
insert().into(@professor).nodes([{_id:"P001",_uuid:1,age:53,email:"[email protected]"},{_id:"P002",_uuid:2,age:27,email:"[email protected]"}])
insert().into(@student).nodes([{_id:"S001",_uuid:3,age:27,email:"[email protected]"},{_id:"S002",_uuid:4,age:20,email:"[email protected]"},{_id:"S003",_uuid:5,age:25,email:"[email protected]"}])
Common Usage
Example: Calculate the deduplicated age of all nodes in the graph
find().nodes() as n
return dedup(n.age)
53
27
20
25