How to save/load multiple user input from/to single database field ?

i would have 3 items from database, every items will have some options, it can be dropdown, buttons, tables, etc, because of this i will have only 3 rows in database, and every options will only stored into single row column, how can i load those options from single database fileld ?

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/Basics