mariadb remove prop JSON
+----+--------+-------+-------+---------------------------------+
| id | name | price | stock | attr |
+----+--------+-------+-------+---------------------------------+
| 2 | Shirt | 10.50 | 78 | {"size": 42, "colour": "white"} |
| 3 | Blouse | 17.00 | 15 | {"colour": "white"} |
+----+--------+-------+-------+---------------------------------+
UPDATE
Clothes
SET
attr = JSON_REMOVE(attr, '$.size');
WHERE
id = 2;
+----+--------+-------+-------+---------------------------------+
| id | name | price | stock | attr |
+----+--------+-------+-------+---------------------------------+
| 2 | Shirt | 10.50 | 78 | {"colour": "white"} |
| 3 | Blouse | 17.00 | 15 | {"colour": "white"} |
+----+--------+-------+-------+---------------------------------+