table-insert-row inserts a row of cells before
the current row in a table. The current row where point is located is
pushed down after the newly inserted row. A numeric prefix argument
specifies the number of rows to insert. Note that in order to insert
rows after the last row at the bottom of a table, you must
place point below the table—that is, outside the table—prior to
invoking this command.
table-delete-row deletes a row of cells at point.
A numeric prefix argument specifies the number of rows to delete.