Database Extensions
- Abstraction Layers
- Vendor Specific Database Extensions
- Cubrid
- dBase
- DB++
- FrontBase
- filePro
- Firebird/InterBase
- Informix
- IBM DB2 — IBM DB2, Cloudscape and Apache Derby
- Ingres — Ingres DBMS, EDBC, and Enterprise Access Gateways
- MaxDB
- Mongo
- mSQL
- Mssql — Microsoft SQL Server
- MySQL
- Mysqli — MySQL Improved Extension
- Mysqlnd — MySQL Native Driver
- mysqlnd_qc — Mysqlnd query result cache plugin
- OCI8 — Oracle OCI8
- Ovrimos SQL
- Paradox — Paradox File Access
- PostgreSQL
- SQLite
- SQLite3
- Sybase
- tokyo_tyrant