Contains a collection of source datasets for querying data.
property SourceDataSets: TDataSetLinks;
Use the property to create a list of the data sources to which the SQL statement will be executed. Each data source has to be a TDataSet descendant, connected to a database and opened prior to SQL statement execution in the TVirtualQuery. Each data source gets its own "schema name" and "table name" which are used to identify the data source in the SQL statement. Each data source must have a unique combination of schema name and table name.