“ʷʰᵉⁿ ᵃ ᵐᵃⁿ ˡᵉᵃʳⁿˢ ᵗᵒ ˡᵒᵛᵉ, ʰᵉ ᵐᵘˢᵗ ᵇᵉᵃʳ ᵗʰᵉ ʳⁱˢᵏ ᵒᶠ ʰᵃᵗʳᵉᵈ.”
if the data has not been changed, no new rows will appear.