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CodeSignal

Modifying Data

via CodeSignal

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Overview

Learn to update existing data, delete nodes and relationships safely, and use MERGE to prevent duplicates. Master SET, REMOVE, DELETE, and DETACH DELETE while maintaining data integrity and idempotency across your Neo4j graph.

Syllabus

  • Unit 1: Updating Node Properties
    • Your First Property Update
    • Writing Your Complete Update Query
    • Adding New Node Properties
  • Unit 2: Removing Node Properties
    • Debugging Your First REMOVE Statement
    • Build Your Complete REMOVE Query
    • Cleaning Up Contact Information
    • Two Approaches to Property Removal
  • Unit 3: Deleting Relationships Safely
    • Complete Your First Relationship Deletion
    • Write a Complete Deletion Query
    • Remove All Outgoing Friendships
  • Unit 4: Deleting Nodes Safely
    • Your First Node Deletion
    • Building a Batch Deletion Query
    • Applying Deletion to Product Data
    • Deleting and Verifying Node Removal
  • Unit 5: Using MERGE for Uniqueness
    • Observing Duplicate Nodes in Action
    • Preventing Duplicate Artist Nodes
    • Building Complete Property Patterns
    • Linking Artists to Their Albums
    • Initializing Properties on Node Creation

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