Print key, value pairs from nested MYSQL json - mysql

Question

I have extracted a mysql json dictionary strucutre and I wish to get all the values associated with the keys alpha and beta; however I also wish to print the key too. The structure of the dictionary is:
results =
{1:
{"a": {"alpha": 1234,
"beta": 2345},
"b": {"alpha": 1234,
"beta": 2345},
"c": {"alpha": 1234,
"beta": 2345},
},
2:
{"ab": {"alpha": 1234,
"beta": 2345},
"ac": {"alpha": 1234,
"beta": 2345},
"bc": {"alpha": 1234,
"beta": 2345},
},
3:
{"abc": {"alpha": 1234,
"beta": 2345}
}
"random_key": "not_interested_in_this_value"
}
So far I have been had some succes extracting the data I wish using:
SELECT JSON_EXTRACT alpha, beta FROM results;
This gave me the alpha and beta columns; however, I ideally would like to assoicate each value with their key to get:
+-------+---------+---------+
| key | alpha | beta |
+-------+---------+---------+
| a | 1234. | 2345. |
| b | 1234. | 2345. |
| c | 1234. | 2345. |
| ab | 1234. | 2345. |
| ac | 1234. | 2345. |
| bc | 1234. | 2345. |
| abc | 1234. | 2345. |
+-------+---------+---------+
I am very new to mysql and any help is appreciated.

Answer 1

First of all, what you posted is not valid JSON. You can use integers as values, but you can't use integers as keys in objects. Also you have a few spurious , symbols. I had to fix these mistakes before I could insert the data into a table to test.
I was able to solve this using MySQL 8.0's JSON_TABLE() function in the following way:
select
j2.`key`,
json_extract(results, concat('$."',j1.`key`,'"."',j2.`key`,'".alpha')) as alpha,
json_extract(results, concat('$."',j1.`key`,'"."',j2.`key`,'".beta')) as beta
from mytable
cross join json_table(json_keys(results), '$[*]' columns (`key` int path '$')) as j1
cross join json_table(json_keys(json_extract(results, concat('$."',j1.`key`,'"'))), '$[*]' columns (`key` varchar(3) path '$')) as j2
where j2.`key` IS NOT NULL;
Output:
+------+-------+------+
| key | alpha | beta |
+------+-------+------+
| a | 1234 | 2345 |
| b | 1234 | 2345 |
| c | 1234 | 2345 |
| ab | 1234 | 2345 |
| ac | 1234 | 2345 |
| bc | 1234 | 2345 |
| abc | 1234 | 2345 |
+------+-------+------+
If you find this sort of query too difficult, I would encourage you to reconsider whether you want to store data in JSON.
If I were you, I'd store data in normal rows and columns, then the query would be a lot simpler and easier to write and maintain.