Databases Intermediate

What is Elastic Search?

A distributed search and analytics engine built on Apache Lucene, optimized for full-text search and log analysis.

Elasticsearch indexes documents as JSON and provides powerful full-text search with relevance scoring. It supports fuzzy matching, aggregations, geospatial queries, and auto-completion. The ELK Stack (Elasticsearch, Logstash, Kibana) is the standard for log analysis.

Use cases include website search, application monitoring, security analytics, and business intelligence. Elasticsearch scales horizontally across clusters of nodes.

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Related Terms

An advanced open-source relational database known for its reliability, feature richness, and standards compliance.

The default index type in most databases that organizes data in a balanced tree structure for efficient searching, sorting, and range queries.

Window Function

An SQL function that performs calculations across a set of rows related to the current row without collapsing the result set.

Database Backup

The process of creating copies of database data to protect against data loss from failures, corruption, or human error.

Row-Level Security (RLS)

A database feature that restricts which rows a user can access in a table based on security policies.

Connection String

A formatted string containing all parameters needed to establish a connection to a database server.

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