Discover Elasticsearch’s architecture and capabilities. Learn about indexing and storing data, conducting precise queries, including fuzzy searches, and executing real-time data analysis effectively.

ElasticSearch- The Definitive Guide) (1).png

elastikibana.tar.gz

Live

Live-copy

Live-shell-script

This course explores Elasticsearch, an open-source, Java-based, full-text search and analytics engine that harnesses the power of the Lucene library. You’ll discover its capabilities as a versatile search engine for business data, offering the ability to store information, conduct searches on accurate and typo-ridden text, and perform real-time data analysis on vast datasets.

Throughout this course, you will gain comprehensive insights into the architecture of Elasticsearch and master the art of indexing and storing data within the Elasticsearch framework. You will progress to learn how to execute various types of queries, including fuzzy queries, and explore the intricacies of each operation and how it is implemented within Elasticsearch.

After completing the course, you’ll have gained a comprehensive understanding of the internal mechanisms of Elasticsearch and developed the skills to effectively use it for your data management and analysis requirements.

Elasticsearch Fundamentals: Indexing and Querying Data

# Overview
Term-level queries offer a precise and direct approach to searching and retrieving documents, targeting specific terms or patterns without undergoing any analysis or tokenization of the search terms. In addition to term and range queries, term-level queries offer a variety of other useful query types, including:

- Prefix query

- Wildcard query

- Regex query



# Prefix query

A prefix query is a type of query that enables searching for documents based on terms with a specific prefix. For instance, if we have a collection of documents containing terms such as `"apple"`, `"application"`, and `"aptitude"`, performing a prefix query with the prefix `"app"` would retrieve the documents `"apple"` and `"application"`, because they both start with the prefix `"app"`.






# Wildcard query

A wildcard query is a type of query that enables searching for documents using a wildcard pattern. A **wildcard pattern** is a string that includes special characters or placeholders to represent unknown or variable parts of a term. The two common operators used in wildcard patterns are the question mark `"?"`, which matches any single character, and the asterisk `"*"`, which can match zero or more characters, including an empty one. Additionally, normal characters in the pattern represent themselves in the search. 
For example, the wildcard pattern `"ap*"` can match terms such as `"apple"`, `"apt"`, and `"ap"` because they fit the pattern.


Explore more term-level queries and learn how you can utilize them.

Introduction to Elasticsearch

Getting started on Elasticsearch

Text Analysis

Search on ElasticSearch

Aggregation

Conclusion

Integrate Elasticsearch in the Ruby on Rails Application

Term-Level Queries: Exploring More Queries

Overview

Prefix query

Wildcard query