Cypher
Cypher is a declarative graph query language designed specifically for querying graph databases, most notably Neo4j. It allows developers to express complex graph patterns and relationships in a human-readable syntax, making it easier to work with connected data. Cypher enables operations like creating, reading, updating, and deleting nodes, relationships, and properties in graph databases.
Developers should learn Cypher when working with graph databases like Neo4j to efficiently query and manipulate highly connected data, such as social networks, recommendation engines, fraud detection systems, or knowledge graphs. It is essential for scenarios where relationships between data points are as important as the data itself, offering performance advantages over SQL for traversing complex networks.