postgres jsonb_set multiple keys update

I have DB table with jsonb column.

number  | data
    1   | {"name": "firstName", "city": "toronto", "province": "ON"}

I need a way to update data column. So my output should look like:

{"name": "firstName", "city": "ottawa", "province": "ON", "phone": "phonenum", "prefix": "prefixedName"}

Is it possible with json_set? I have added query like:

update table_name set data = jsonb_set(data, '{city}', '"ottawa"') where number = 1;

However, I need a way to add new key-value if it does not exists and update key value if it exists. Is it possible to achieve this in single query?

The documentation says:

The || operator concatenates the elements at the top level of each of its operands. ... For example, if both operands are objects with a common key field name, the value of the field in the result will just be the value from the right hand operand.

So using your example data:

update table_name set
    data = data || '{"city": "ottawa", "phone": "phonenum", "prefix": "prefixedName"}'
    where number = 1;

Additionally if the object you want to edit is not at the top level - just combine the concatenation and jsonb_set function. For example, if the original data looks like

{"location": {"name": "firstName", "city": "toronto", "province": "ON"}}

then

...
data = jsonb_set(
    data, 
    '{location}', data->'location' || '{"city": "ottawa", "phone": "phonenum", "prefix": "prefixedName"}')
...

You can try this

Here we are using jsonb concatation operator || to Concatenate two jsonb objects

update table_name set data = (select val from (
(select 
CASE WHEN data ? key THEN jsonb_set(data, '{' || key || '}', quote_nullable(updated_value))
ELSE 
data || ('{' || quote_ident(key) || ':' || quote_ident(some_value) || '}')::jsonb
END val
 from json_each_text((select data::json from tbl))
CROSS JOIN tbl t
where key in ('city','phone','prefix') and number=1)) where number=1