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Cursors are database objects that provide the mechanism for accessing data that you have queried. The storage procedure languages of databases that are SQL:2003 standardized come with such object orientation.

Different Relational Databases provide External Cursors (such as Oracle Call Interface (OCI) and MSSQL and Sybase with TSQL).

Some programming languages provide API to make use of Cursors (such as PHP with MySQL, cursors are used via mysql_query, mysql_fetch_array, mysql_fetch_object, and so forth)

Here is the list of vendor specific database extensions with cursor functionality for PHP : http://us3.php.net/manual/en/refs.database.vendors.php

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