QGIS/resources/context_help/QgsDbSourceSelect-en_US

<h3>Add PostGIS Tables</h3>
This dialog allows you to add PostGIS layers (tables with a geometry column) to the QGIS map canvas.
<h4>Connections</h4>
<ul>
<li>Choose the connection to use from the drop-down box and click <label>Connect</label> 
<li>If there are no connections, use the <label>New</label> button to create a connection
<li>To modify a connection, click the <label>Edit</label> button
</ul>
<h4>Adding Layers</h4>
To add a layer:
<ol>
<li>Choose the desired connection from the drop-down box
<li>Click <label>Connect</label>
<li>Find the layer you want to add in the list and click on it to select it
<li>You can select additional layers by holding down the Ctrl key and clicking
<li>Click <label>Add</label> to add the layer(s) to the map
</ol>
<h4>Filtering a Layer</h4>
To filter a layer before adding it to the map, double click on its name. This will open the Query Builder, allowing you to build up a SQL statement to use in filtering the records.