Returned Type:
DataTable
Returns a DataTable corresponding to input parameters.
If Schema parameter is set to 0 (zero), no schema will be returned and all fields will be string type; otherwise, if Schema parameter is set to 1 (one) or 2 (two) the Query will get the exact schema of all returned fields and this schema will be applied to the returned DataTable.
If Schema parameter is set to 2 (two) the DataTable will contain only columns headers without data.