How to convert result table to JSON array in MySQL

There are two "group by" functions for JSON called json_arrayagg, json_objectagg.

This problem can be solved with:

SELECT json_arrayagg(
    json_merge(
          json_object('name', name), 
          json_object('phone', phone)
    )
) FROM person;

This requires MySQL 5.7+.

If you're stuck on MySQL 5.6 like me, try this:

SELECT
    CONCAT(
       '[',
       GROUP_CONCAT(
           CONCAT(
               '{"name":"', name, '"',
               ',"phone":"', phone, '"}'
           )
       ),
       ']'
    ) as json
FROM person

New solution:

Built using Your great comments, thanks!

SELECT JSON_ARRAYAGG(JSON_OBJECT('name', name, 'phone', phone)) from Person;

---

Old solution:

With help from @Schwern I managed to put up this query, which seems to work!

SELECT CONCAT(
    '[', 
    GROUP_CONCAT(JSON_OBJECT('name', name, 'phone', phone)),
    ']'
) 
FROM person;

You can use json_object to get rows as JSON objects.

SELECT json_object('name', name, 'phone', phone)
FROM person;

This won't put them in an array, or put commas between them. You'll have to do that in the code which is fetching them.