Cypher is the declarative query language for Neo4j, the world's leading graph database, and it keeps evolving with time. The language is constantly documented in a reference card that is updated for every new version of Neo4j. You can find the complete Cypher Ref Card online at https://neo4j.com/docs/cypher-refcard/current/.
The refcard is also available from the Neo4j browser, the third tab on the left of the screen ("Documents") has a Cypher Refcard link.
Although URL schemes changed between versions, like http://neo4j.com/docs/2.0/cypher-refcard/ for version 2.0 and http://neo4j.com/docs/cypher-refcard/3.1/ for version 3.1, older versions of the refcard are still available.
Note
My advice is to download the PDF versions of the refcard for the Neo4j version(s) you use. This keeps me safe from network issues at the office. I also have one on my smartphone because it helps solve syntax errors.
The PDF refcard for version 3.2 is available at https://neo4j.com/docs/pdf/cypher...