MySQL從數組中提取JSON元素

Question

我需要按索引提取JSON元素，例如

SELECT JSON_EXTRACT('[{"featureId":"a","read":1,"write":1,"delete":1},{"featureId":"2","read":1,"write":0,"delete":1}]', '$[0].*');

但是它只是提取我​​想要提取的部分的值，像這樣：

{
    "featureId": "a",
    "read": 1,
    "write": 1,
    "delete": 1
}

Answer 1

嘗試：

SELECT JSON_EXTRACT('
  [
    {"featureId":"a","read":1,"write":1,"delete":1},
    {"featureId":"2","read":1,"write":0,"delete":1}
  ]
', '$[0]');

參見db-fiddle 。