When the selection arrow is showing, clicking once or twice will select the current cell or the entire row or a column, depending on where the arrow is pointed. Clicking three times when the selection arrow is showing selects the entire table. The table with its structure is placed in the clipboard.
Entire Table Deletes the entire table.
Table Contents Erases the contents and leaves the formatting and line patterns. Formulas Only Formulas are removed but the resulting would look the same, but if you want to change numbers, you cannot use Calculate to update the information. This is not in the WP6.0 release. Table Structure Leaves the contents and places a Left Tab code between columns. If you use this option, you would need to adjust tab settings in the Ruler Bar at the start of your table.