"How Deep Is the Ocean?" is a #popular song written by #IrvingBerlin in 1932. The song was developed from an earlier Berlin song "To My #Mammy" which was sung by #AlJolson in his film Mammy (1930). In the earlier song, the lyrics include the questions "How deep is the ocean? / How high is the sky?" and this was the genesis of "How Deep Is the Ocean?".
https://www.youtube.com/watch?v=I0BFpo8huU8