Name of a server in the database servers list
SQL Query (query)This is the SQL query. Note that when executed, and select .... from expressions will be ignored, and will be replaced by the expressions required by the data controls.
Top Table (toptable)Unique key (primary)
Name of a unique key column. Strictly, any unique column will suffice, but the primary key column if there is one is preferred; the column comes from the top table.