Database Reference
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CodeIgniter comes with a full-featured and very fast abstracted
database class that supports both traditional structures and Query
Builder 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

* Query Builder Class

* Transactions

* Getting MetaData

* Custom Function Calls

* Query Caching

* Database Manipulation with Database Forge

* Database Utilities Class

* Database Driver Reference
