Couchbase

1. Document-Oriented: Stores data in JSON format for flexible schema-less data modeling.

2. Distributed Architecture: Horizontal scalability across multiple nodes for high availability.

3. High Performance: In-memory caching and efficient data distribution for low-latency access.

4. N1QL Query Language: SQL-like query language for querying and manipulating JSON data.

Before learning Couchbase, it's beneficial to have the following skills:

1. Database Fundamentals: Understanding of basic database concepts such as tables, indexes, and queries.

2. NoSQL Concepts: Familiarity with NoSQL database concepts like document-oriented databases and key-value stores.

3. JSON: Knowledge of JSON (JavaScript Object Notation) for data modeling and manipulation.

4. SQL: Basic understanding of SQL (Structured Query Language) for querying and managing relational databases.

By learning Couchbase, you gain the following skills:

1. NoSQL Database Management: Ability to design, deploy, and manage NoSQL databases using Couchbase.

2. Document-Oriented Data Modeling: Skill in modeling data in JSON format and leveraging document-oriented database concepts.

3. Querying with N1QL: Proficiency in using N1QL (pronounced "nickel"), a SQL-like query language, for querying and manipulating JSON data in Couchbase.

4. Scalability and High Availability: Understanding of Couchbase's distributed architecture and techniques for scaling and ensuring high availability.