XML

Database Index Types - XML

Database indexes are data structures used to speed up data retrieval. Various types exist depending on the use case, including B-Tree indexes, Hash indexes, and Bitmap indexes, each optimized for specific query patterns and data characteristics. Selecting the appropriate index is a crucial element in database performance optimization.

database index B-Tree Hash Bitmap SQL performance optimization

<?xml version="1.0" encoding="UTF-8"?>
<items>
  <item>
    <code>1</code>
    <slug>b-tree-index</slug>
    <name>B-Tree Index</name>
    <description>The most commonly used balanced tree structure index.</description>
    <category>General-purpose Index</category>
    <supportedDatabases>[&quot;MySQL&quot;,&quot;PostgreSQL&quot;,&quot;Oracle&quot;,&quot;SQL Server&quot;,&quot;MongoDB&quot;]</supportedDatabases>
    <useCases>[&quot;Equality searches&quot;,&quot;Range queries&quot;,&quot;Sorting operations&quot;,&quot;Primary keys&quot;,&quot;Foreign keys&quot;]</useCases>
  </item>
  <item>
    <code>2</code>
    <slug>hash-index</slug>
    <name>Hash Index</name>
    <description>An index providing constant-time access using hash functions.</description>
    <category>Key-value Index</category>
    <supportedDatabases>[&quot;Redis&quot;,&quot;MySQL (MEMORY)&quot;,&quot;PostgreSQL&quot;,&quot;Some NoSQL databases&quot;]</supportedDatabases>
    <useCases>[&quot;Equality searches&quot;,&quot;Point lookups&quot;,&quot;Transaction processing&quot;,&quot;Key-value access&quot;]</useCases>
  </item>
  <item>
    <code>3</code>
    <slug>bitmap-index</slug>
    <name>Bitmap Index</name>
    <description>An index using bit arrays optimized for low-cardinality columns.</description>
    <category>Analytical Index</category>
    <supportedDatabases>[&quot;Oracle&quot;,&quot;PostgreSQL (extensions)&quot;,&quot;Data warehouse systems&quot;]</supportedDatabases>
    <useCases>[&quot;Low-cardinality columns&quot;,&quot;Data warehousing&quot;,&quot;Complex filtering&quot;,&quot;Read-heavy environments&quot;]</useCases>
  </item>
  <item>
    <code>4</code>
    <slug>full-text-index</slug>
    <name>Full-Text Index</name>
    <description>An index specialized for searching unstructured text data.</description>
    <category>Text Search Index</category>
    <supportedDatabases>[&quot;MySQL&quot;,&quot;PostgreSQL&quot;,&quot;SQL Server&quot;,&quot;Elasticsearch&quot;]</supportedDatabases>
    <useCases>[&quot;Full-text search&quot;,&quot;Partial match search&quot;,&quot;Similar word search&quot;,&quot;Document search&quot;]</useCases>
  </item>
  <item>
    <code>5</code>
    <slug>vector-index</slug>
    <name>Vector Index</name>
    <description>An index specialized for similarity search of high-dimensional vectors.</description>
    <category>AI/ML Index</category>
    <supportedDatabases>[&quot;PostgreSQL (pgvector)&quot;,&quot;Pinecone&quot;,&quot;Milvus&quot;,&quot;Weaviate&quot;]</supportedDatabases>
    <useCases>[&quot;Similarity search&quot;,&quot;Image search&quot;,&quot;Recommendation systems&quot;,&quot;Semantic search&quot;]</useCases>
  </item>
  <item>
    <code>6</code>
    <slug>spatial-index</slug>
    <name>Spatial Index</name>
    <description>An index specialized for searching geospatial data.</description>
    <category>Geospatial Index</category>
    <supportedDatabases>[&quot;PostgreSQL (PostGIS)&quot;,&quot;MySQL&quot;,&quot;Oracle Spatial&quot;,&quot;MongoDB&quot;]</supportedDatabases>
    <useCases>[&quot;Neighbor search&quot;,&quot;Range search&quot;,&quot;Distance calculation&quot;,&quot;Geographic information search&quot;]</useCases>
  </item>
</items>