generate https: address for every wix image in database

Would appreciate some directions here. I have a database with an image column. I am looking to export this database and have an equivalent column that has the https:// URL of the the image.

Would appreciate some direction on how to achieve this within the database unless there is some other obvious conversion.

Have not employed code before within this system - though I think I must use the src function, but not sure where to define or how.

Thank you!

Deborah