从SQL中的多数据列中提取数据

Question

I'm creating a sales leaderboard in HOLISTICS and the column " user_id " is a multi-data column.

Here's a snapshot of the column "user_id":

I need to show the "name" part of the user. I tried using CONVERT and even JSON_VALUE but both are not recognized by Holistics.

I used CAST but still the user_id is in numerical form.

Here's the my code:

And here's the data output:

Can you help me on what to do to be able to show the actual name of the sales person?

---

I'm a newbie here and its my first post that's why all my snipshots are put in a link form.

Answer 1

To select a particular field from a JSON data (and JSON is what you have in user_id column), try this combination:

SELECT 
  JSON_UNQUOTE(JSON_EXTRACT(user_id,'$.id')) as id
  JSON_UNQUOTE(JSON_EXTRACT(user_id,'$.name')) as user_name
FROM public.deals

This should return the user's id and name from your JSON column.

Whatever software you use, it probably expects the data to be retrieved in a row-column format , so you just need to play with the SQL query, so that it returns properly formatted data. And since you have JSONs in a user_id column (which seems weird, but nevermind) - a combination of JSON_EXTRACT, JSON_UNQUOTE and perhaps CAST should do the trick.

But bear in mind, that running DISTINCT on a big table using those methods could be slow.