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Open Source Database Feature Comparison Matrix
Looking for a database? This handy database feature comparison matrix and glossary let you compare and contrast the supported features of four popular open source databases: Apache Derby 10.1, MySQL 5.0, PostgreSQL 8.1, and One$DB 4.0.
| by Joshua D. Drake, |
| Uday Parmar |
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Apache Derby 10.1
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MySQL 5.0
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PostgreSQL 8.1
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One$DB 4.0
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General
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Database Connections
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Multiple
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Multiple
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Multiple
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Multiple
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Concurrent Access to Multiple Databases
|
√
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√
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√
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√
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Multi-version
Concurrency Control
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X
|
√
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√
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√
|
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Unicode
Support
|
√
|
√
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√
|
√
|
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Replication Support
|
√
|
√
|
√
|
√
|
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License
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Apache (BSD)
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GPL
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BSD
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LPGL
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Specifications
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|
|
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SQL 99
|
√
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X
|
√
|
√
|
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ODBC
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*
|
√
|
√
|
√
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Relational Database Features
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|
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Sequences/Auto-increment Column
|
√
|
√
|
√
|
√
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User Defined Functions
|
√
|
√
|
√
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X
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Update-capable Views
|
√
|
√
|
√
|
√
|
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Referential Integrity
|
√
|
√
|
√
|
√
|
| Triggers
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Statement / Row Level
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| Before / After
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| Nesting
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| Compound
|
|
√
|
√
|
√
|
√
|
|
√
|
√
|
√
|
√
|
|
√
|
X
|
√
|
√
|
|
√
|
√
|
√
|
√
|
|
Domains
|
X
|
X
|
√
|
√
|
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BLOB
|
√
|
√
|
√
|
√
|
|
CLOB
|
√
|
√
|
√
|
√
|
|
Name Length Limit
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128
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64
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64
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128
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Delimited Identifiers
|
√
|
√
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√
|
√
|
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Stored Procedures
|
√
|
√
|
√
|
√
|
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Procedural Languages
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|
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PL/SQL (or equivalent)
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X |
√
|
√
|
√
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Java
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√
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X
|
*
|
X
|
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Python
|
X
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X
|
√
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X
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Perl
|
X
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X
|
√
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X
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PHP
|
X
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X
|
√
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X
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Ruby
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X
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X
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*
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X
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R
|
X
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X
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*
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X
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Key to Symbols
|
|
√
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Feature supported
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X
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Feature not supported
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*
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External or unofficial support
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