Level Based controls are Scroll AREA, Grid and Scroll BAR.

Scroll areas have their page fields arranged by the developer. Page fields in a gird ALWAYS appear in a single row. In grid we can view no of rows by giving occurrences. Scroll areas provide a row separator when you select multiple occurrences of data. We can view multiple rows in a grid while in a scroll area you can RETRIEVE only one row at a time. One can have nested scroll areas but not GRIDS. You can insert grid in a scroll area but not scroll in a grid.

Level Based controls are Scroll Area, Grid and Scroll Bar.

Scroll areas have their page fields arranged by the developer. Page fields in a gird always appear in a single row. In grid we can view no of rows by giving occurrences. Scroll areas provide a row separator when you select multiple occurrences of data. We can view multiple rows in a grid while in a scroll area you can retrieve only one row at a time. One can have nested scroll areas but not grids. You can insert grid in a scroll area but not scroll in a grid.