Cypher Query errors when trying to exclude NULLS and Was

Neo4j Graph Platform Cypher
1

Hi there, I am back again. I have a Cypher query that I am using and it is as follows:
MATCH (c:Collector),(s:Site)
with c,s
WHERE NOT c.name IS NULL,
WHERE NOT s.name IS NULL,
AND c.year =s.year AND c.month = s.month,
RETURN DISTINCT(c.name), s.name, c.month, c.year, s.year

This query is meant to show me collectors that were collecting from the same site at the same time, i.e. same month and year.I am trying to exclude NULLS and NA from the results, how best can I structure the query as this is giving me error.

Also, is it possible to have a variant of the query to have a look at people collecting at the same location but a year apart, how would I change the query to achieve these results?

2

Hi,

You have stray commas on the end of line 3 and line 4. Also if you want to do multiple conditions in a WHERE clause the 2nd+ conditions can be prefixed with AND.

I think you want to check whether the property name exists on those nodes. If that's the case, the following query should do the trick:

MATCH (c:Collector),(s:Site)
WHERE exists(c.name) AND exists(s.name)
AND c.year =s.year AND c.month = s.month
RETURN DISTINCT(c.name), s.name, c.month, c.year, s.year
3

If I slightly amend this query and add a 1 after the s.year in after the AND as shown below, does this translate to that I am now comparing where this are 1 year apart?

MATCH (c:Collector),(s:Site)
WHERE exists(c.name) AND exists(s.name)
AND c.year =s.year+1 AND c.month = s.month
RETURN DISTINCT(c.name), s.name, c.month, c.year, s.year