jsonb_each to access elements inside objects - json

Question

I have a JSON column (called "roi") which contains users' Instagram performance. This is the roi column:
{
"data": {
"campaignName": "Master Cosy",
"currency": "GBP",
"reportData": {
"AAAAAAAAAA": {
"id": "0f20d833-d0f-bdb7-19",
"name": "cornish_gregorys",
"thumbnail": "https://sstagram.com/v/t51.2885-19/s320x320/87244862_1017848048596",
"Name": "cornisorys",
"instagramCount": 2319,
"instagramEngagementFactor": 0,
"instagramAuthorised": true,
"hasPosts": true,
"budget": 0,
"derivedFee": 0,
"inventoryItems": [],
"trackedAssetsStats": {
"totalAssets": 9,
"facebook": {
"count": 0
},
"instagram": {
"total": 9,
"stories": 9,
"carousels": 0,
"videos": 0,
"images": 0,
"igtvs": 0
},
"BBBBBBBBBBBBB": {
"id": "d3d30db4-0b453dfc3ae2a09",
"name": "itssdha",
"thumbnail": "https://in9809609728_n.jpg?_nc_ht=instagram.fhel5-1.fna.fbcdn.net&_nc_ohc=Se3ySAoqnFwAX4f6&oeF1623",
"Name": "itsshdha",
"instagramCount": 26700,
"instagramEngagementFactor": 0,
"instagramAuthorised": true,
"hasPosts": true,
"budget": 0,
"derivedFee": 0,
"inventoryItems": [],
"trackedAssetsStats": {
"totalAssets": 5,
"facebook": {
"count": 0
},
"instagram": {
"total": 9,
"stories": 9,
"carousels": 0,
"videos": 0,
"images": 0,
"igtvs": 0}, etc.....
After "reportData" I have the specific names of the users (in this case AAAAAAAA and BBBBBBBBB) and within them the performance of their Instagram accounts. How can I access all the metrics within the object username without having to type the specific username (AAAAAAAA and BBBBBBBBB)
My query is this:
roi -> 'date' -> 'reportData' -> 'AAAAAAA' -> 'instagramCount' -> etc ....
But I need something to 'jump' this part -> 'AAAAAAA' -> and go straight to the metrics, in this case 'instagramCount', etc...
From what I have read I may need to use jsonb_each, does anyone know how to use it?

Answer 1

demos:db<>fiddle
You have several ways.
Use jsonb_each() to expand all users' data: You can create a record per user and than ask for the count afterwards
SELECT
users.value -> 'instagramCount'
FROM
mytable,
jsonb_each(mydata -> 'data' -> 'reportData') as users
Since Postgres 12 you can use JSONpath for that, to achieve the same:
SELECT
jsonb_path_query(mydata, '$.**.instagramCount')
FROM mytable