Explore non null properties for a given label

Author: JohT

cypher/Exploration/Explore_node_properties_non_null.cypher

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+// Explore non null node property counts for the selected node label. Variables: projection_node_label
+
+  MATCH (selectedNode)
+  WHERE $projection_node_label IN labels(selectedNode)
+   WITH *, keys(selectedNode) AS nodeProperties
+ UNWIND nodeProperties    AS nodeProperty
+   WITH *
+ ORDER BY nodeProperty
+  WHERE selectedNode[nodeProperty] IS NOT NULL
+   WITH  nodeProperty, count(*) AS nonNullCount
+// RETURN nodeProperty, nonNullCount 
+// ORDER BY nodeProperty, nonNullCount
+ RETURN nonNullCount
+       ,count(DISTINCT nodeProperty) AS propertyCount
+       ,collect(nodeProperty)        AS properties
+ORDER BY nonNullCount DESC