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

A column that creates a link between two tables by referencing the primary key of another table.

Window Function

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

CTE (Common Table Expression)

A temporary named result set defined within a SQL statement using the WITH clause, improving query readability and enabling recursion.

A column or set of columns that uniquely identifies each row in a database table.

PostgreSQL's binary JSON data type that stores JSON documents with indexing, querying, and manipulation capabilities.

A category of databases that store data in non-tabular formats, optimized for specific data models and access patterns.

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