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Databases Intermediate

What is Database Index Types?

Different index structures (B-tree, Hash, GIN, GiST, BRIN) optimized for various query patterns and data types.

Database index types serve different purposes: B-tree indexes handle equality and range queries efficiently and are the default in most databases. Hash indexes are optimized for equality comparisons only. GIN (Generalized Inverted Index) indexes excel at full-text search and JSONB queries in PostgreSQL. GiST (Generalized Search Tree) indexes support geometric data and range types. BRIN (Block Range Index) indexes are compact indexes ideal for naturally ordered data like timestamps. Choosing the right index type can improve query performance by orders of magnitude.

Related Terms

Database Constraint
Rules enforced by the database to maintain data integrity, including NOT NULL, UNIQUE, CHECK, PRIMARY KEY, and FOREIGN KEY.
Database Connection Pooling
A technique that maintains a cache of database connections for reuse, reducing the overhead of creating new connections.
Connection Pool
A cache of database connections that can be reused, avoiding the overhead of creating new connections for each request.
Schema
The structure definition of a database including tables, columns, data types, relationships, indexes, and constraints.
Replication
The process of copying and maintaining database data across multiple servers for redundancy, failover, and read scaling.
Migration
A version-controlled change to a database schema that can be applied and reversed systematically.
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