This tab provides a limited functionality for running queries directly to the database.
The first thing to note is the field for SQL server and Database.
If the database you're looking for is not available in the drop-down menu then you need to check that you have the correct server selected.
In the Client tab you will see both the server IP or name along with the database name.
On the left hand side you will find buttons for running, deleting, loading from a file, and saving the query.
The bottom section shows the results of the last query that has been executed.
When you have results on a query you can use the contextual menu on the left side to save the results to a text file or a spreadsheet in Microsoft Excel.