JSON字段是单对象
SELECT json_column->"$.key" FROM your_table;
或
SELECT JSON_EXTRACT(json_column, '$.key') as key FROM your_table;
JSON字段是数组对象
SELECT json_column->'$[*].key' as keys FROM your_table;
或
SELECT JSON_EXTRACT(json_column, '$[*].key') as keys FROM your_table;
where 查询同理