On Friday, May 6, 2022, Shaozhong SHI <shishaozhong(at)gmail(dot)com> wrote:
> A json object is like this - {3}.
>
> How to get the value -3 out of this json object {3}
>
>
That isn’t valid json so your question doesn’t make sense.
Just treat it as a text type and use one or more of the documented text
functions to manipulate it.
David J.