Updating data using actions in CSV files

Author: renetapopova

modules/ROOT/pages/tools/neo4j-admin/neo4j-admin-import.adoc

@@ -1441,6 +1441,34 @@ neo4j_home$ --nodes persons.csv --nodes games.csv --id-type string
 The `id` property of the nodes in the `persons` group will be stored as `long` type, while the `id` property of the nodes in the `games` group will be stored as `string` type, as the global `id-type` is a string.
 ====
 
+[role=label--new-5.26]
+[[import-tool-actions-csv-files]]
+== Updating data using actions in CSV files
+
+You can use actions in CSV files to update data during incremental import.
+This feature is especially useful when you want to update existing nodes or relationships in large datasets.
+
+In the header file, you can specify whether an action should be taken for the data in the fields using the `:ACTION` keyword.
+If no action is specified, the import tool works as in full import mode, creating new data.
+
+The following actions are supported:
+
+* `empty` = `CREATE` (default)
+* `C`, `CREATE` - Creates a new entity.
+* `U`, `UPDATE` - Updates an existing entity.
+* `D`, `DELETE` - Deletes an existing entity.
+Deleting a node also deletes its relationships (`DETACH DELETE`).
+
+On each row in the data file, you can specify the action for the data in the fields.
+
+.Using actions in CSV files to update data
+[source, cypher, role="nocopy"]
+----
+:ACTION,personId:ID,name,:LABEL
+CREATE,1,"Keanu Reeves",Actor
+UPDATE,2,"Laurence Fishburne",Actor
+DELETE,4
+----
 
 == Importing data that spans multiple lines