# OSGeo::FDO::Commands::SQL::ISQLDataReader Interface Reference
[OSGeo::FDO::Commands::SQL]

Inheritance diagram for OSGeo::FDO::Commands::SQL::ISQLDataReader:

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## Detailed Description

The ISQLDataReader interface provides a forward-only, read-only iterator for reading relational table data. A reference to an ISQLDataReader is returned from the SQLCommands ExecuteReader method. The initial position of the ISQLDataReader interface is prior to the first item. Thus, you must call ReadNext to begin accessing any data.

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