The rawSql component works in much same way as Zend_Db_Select. You may use method overloading like $q->from()->where() or just use
$q->parseQuery(). There are some differences though:
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1. In Doctrine_RawSql component you need to specify all the mapped table columns in curly brackets {} this is used for smart column aliasing.
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2. When joining multiple tables you need to specify the component paths with addComponent() method
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The following example represents a very simple case where no addComponent() calls are needed. 
Here we select all entities from table entity with all the columns loaded in the records.