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# Query
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A query builder/abstraction layer, using prepared queries for security.
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## Requirements
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* Pdo extensions for the databases you wish to use (unless it's Firebird, in which case, the interbase extension is required)
* PHP 5.2+
## Databases Supported
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* Firebird
* MySQL
* PostgreSQL
* SQLite
* Others, via ODBC
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## Connecting
Create a connection array or object similar to this:
< ?php
$params = array(
'type' => 'mysql',
'host' => 'localhost',
'user' => 'root',
'pass' => '',
'port' => '3306',
'database' => 'test_db',
// Only required
// SQLite or Firebird
'file' => '/path/to/db/file',
);
$db = new Query_Builder($params);
The parameters required depend on the database.
### Running Queries
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Query uses the same interface as CodeIgniter's [Active Record class ](http://codeigniter.com/user_guide/database/active_record.html ). However, it does not implement the `select_` methods, `count_all_results` , `distinct` , `having` , `or_having` , `get_compiled_query` , `insert_batch` , `update_batch` , or `count_all` methods.
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To retreive the results of a query, use the PDO methods `fetch` and `fetchAll` .
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$query = $db->get('table_name');
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$results = $query->fetchAll(PDO::FETCH_ASSOC);