Types of datasets in Database Tour:
To work with tables, use Table tabs, Table menu, the table list and its context menu, and some buttons above the table list. To work with queries, use SQL tabs/windows and Query menu.
Those functions, which are not included in these sections (most of menu items from Tools and Search sections and the upper tool bar), are common for all dataset types. It is important, which tab is active: for example, if you click Export button, the data from the active tab's dataset will be exported.