Architecture

Operating System

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Interface

Indexes

Partitioning

Other Objects

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Database Capabilities

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Website

Email

Relational Model

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$0

GPL v2

SQL Compare SQL Database Management System

Bitmap

Hash

Cursor
External Routine
Function
Procedure

None

Except
Inner Joins
Inner Selects
Intersect
Merge Joins
Outer Joins
Union

ACID Compare Database Management System with ACIDUnicode Compare Database Management System with Unicode

FAQ
Mailing List

LucidDB (luciddb.org)

Object Model

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Windows
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$400

Proprietary

API Compare API Database Management System

R-/R+ Tree

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ACID
Backup
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Import Data
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Unicode
Very small and Fast

VelocityDB (velocitydb.com)