Extract sub JSON with keys and values in MYSQL

Question

I have a table with a JSON TYPE column like this:

id	json_info	date
1.	{"Ccclaptop_model": {"value": "asus", "price": "2122"}, "laptop_ram": {"value": "6", "price": "122"}, "laptop_mouse_model": {"value": "logic", "price": "30"} , "laptop_keys_model": {"value": "USA", "price": "10"}}	2020-02-02

And I'd like to have a query that extracts a sub-JSON with his key value, like this:

id	json_info	date
1.	{"laptop_mouse_model": {"value": "logic", "price": "30"} , "laptop_keys_model": {"value": "USA", "price": "10"}}	2020-02-02

I have tried JSON_EXTRACT

    SELECT id,
       JSON_EXTRACT(json_info, '$.laptop_mouse_model', '$.laptop_keys_model' ) AS store_id 
FROM feature_data WHERE date = '2020-02-02';

but just return a JSON array without keys, like this:

id	json_info	date
1.	[{"value": "logic", "price": "30"} ,{"value": "USA", "price": "10"}]	2020-02-02

Does somebody know if exists a function that I could use?

Answer 1

您可以使用JSON_OBJECT将结果组合为 json，例如：

SELECT id,JSON_OBJECT('laptop_mouse_model',JSON_EXTRACT(json_info, '$.laptop_mouse_model'),'laptop_keys_model',JSON_EXTRACT(json_info, '$.laptop_keys_model')) AS store_id FROM feature_data WHERE date = '2020-02-02';