Knowledge Base

Articles tagged as merge

Explanation of error "Cannot merge node using null property value for"

When running a MERGE, which is a combination of MATCH and/or CREATE one may encounter an error of Cannot merge node using null property value for if the MERGE is…

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How do I use LOAD CSV to update/set properties of existing nodes

One can use LOAD CSV to perform a bulk update to existing nodes, and create new nodes, as follows. If we have a .csv called Movies.csv and its content is: and…

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Understanding how MERGE works

What is MERGE, and how does it work? The MERGE clause ensures that a pattern exists in the graph. Either the entire pattern already exists, or the entire pattern needs…

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