# CodeIgniter User Guide Version 1.5.4

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# The Database Class

CodeIgniter comes with a full-featured and very fast abstracted database class that supports both traditional structures and Active Record patterns. The database functions offer clear, simple syntax.

- Quick Start: Usage Examples
- Database Configuration
- Connecting to a Database
- Running Queries
- Generating Query Results
- Query Helper Functions
- Active Record Class
- Transactions
- Table MetaData
- Field MetaData
- Custom Function Calls
- Query Caching
- Database Utilities Class