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Q&A Union of queries depending on variable in list

Yes, you can achieve this using UNWIND and CALL, in the following pattern: UNWIND ['Canada', 'Europe'] AS region CALL { WITH region query } RETURN * You can replace RETURN * with any o...

posted 4y ago by r~~‭

Answer
#1: Initial revision by user avatar r~~‭ · 2020-12-01T20:14:10Z (almost 4 years ago)
Yes, you can achieve this using `UNWIND` and `CALL`, in the following pattern:

```cypher
UNWIND ['Canada', 'Europe'] AS region
CALL {
  WITH region
  query
}
RETURN *
```

You can replace `RETURN *` with any other end-of-query clause, of course, if you want to order or limit your results for example. But don't omit the `WITH region` inside the `CALL` subquery; without that explicit import, you won't be able to refer to `region` (or any outer query variables) inside the subquery.