This wizard page is no longer used in the default Report Wizard implementation. The following master-detail page is used instead: Choose Columns (Multi-Query Version).
You can switch back to using the standard Report Wizard version in your Web application by disabling the ReportDesignerWizardSettings.UseMasterDetailWizard option.
This page becomes available if the current data source contains two or more data members.
On this page, select a data table or view to use as the report data member and provide data to the report.
Click Next to proceed to the next wizard page: Choose Columns (Single-Query Version).