How to get elements from Json array in PostgreSQL

Question

I have searched quite much on this and still unanswerable. I\'m using PostgreSQL. Column name is \"sections\" and column type is json[] in below example.

My column looks

Answer 1

If you wish to access a single element then use json_array -> [index]

For example, if you have json_arr=[1,2,3] then json_array -> 0 will return 1