Index (Database)
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What is Index (Database)?
An index is a collection of documents that have similar characteristics. Think of it as a database in a relational database system. It's where Elasticsearch stores and organizes data, allowing for efficient searching and retrieval. Each index is identified by a name, which is used when performing indexing, searching, updating, and deleting operations.
Free resources to learn Index (Database)
- Official docsIndex basics
- Official docsWhat is an Elasticsearch index?
- ArticleElasticsearch Index – How to create, list, query and delete indices
- VideoHow Elasticsearch Works: Documents, JSON & Index Explained
- VideoWhat's ElasticSearch Used For? | Search Indexes | Systems Design Interview 0 to 1 with Ex-Google SWE
More in stage 2: Mappings
Index (Database): common questions
Can I learn Index (Database) in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Index (Database) in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Index (Database) tutorial for beginners?
It is lesson 13 of 113 in the free Elasticsearch roadmap, in stage 2, Mappings. If you are new to Elasticsearch, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.