You use the "Report Container" object to add a table. As the name says, a report container can hold several objects.
Tables, charts, crosstabs and Gantt charts can be added in any order, even as sub-elements of tables. This lets you define sub-reports with almost any relationships between tables.
In addition to a report container there can be any number of other report containers and in addition also separate charts, cross tables or Gantt charts.
Hint: The report container and the possibility to insert separate charts, crosstabs or Gantt charts is not available in every application. In applications without report container you can use the "Table" object instead.
See also:
Report Container and Object list