Select by query
With QGIS it is possible also to select features using a similar query builder interface to that used in sec:query_builder. In the above section the purpose of the query builder is to only show features meeting the filter criteria as a 'virtual layer' / subset. The purpose of the select by query function is to highlight all features that meet a particular criteria. Select by query can be used with all vector data providers.
To do a `select by query' on a loaded layer, click on the button to open the attribute table of the layer. Then click the button at the bottom. This starts the Query Builder that allows to define a subset of a table and display it as described in Section sec:query_builder.