Question

我有以下JSON：

{ "firstName": "John",
  "lastName": "Smith",
  "isAlive": true,
  "age": 27,
  "address": {
    "streetAddress": "21 2nd Street",
    "city": "New York",
    "state": "NY",
    "postalCode": "10021-3100"
  },
  "phoneNumbers": [
    {
      "type": "home",
      "number": "212 555-1234"
    },
    {
      "type": "office",
      "number": "646 555-4567"
    },
    {
      "type": "mobile",
      "number": "123 456-7890"
    }
  ],
  "children": [],
  "spouse": "Maria"
}

我正在尝试获取用户拥有的所有数字的数组或表格，有些用户只有1个号码，有些用户有很多，有没有办法调用所有＆＃34;数字＆＃34;在json内

Answer 1

我打算在手机上回答这个问题，请原谅简洁。

SELECT user->>'firstName' as first_name
  , user->>'lastName' as last_name
  , phone_type
  , phone_number
FROM users_tbl
CROSS JOIN LATERAL jsonb_array_elements(user->'phoneNumbers') jarr(num_obj)
CROSS JOIN LATERAL (
  SELECT num_obj->>'type' AS phone_type
    , num_obj->>'number' AS phone_number
  ) nums

使用postgres在json中提取特定的返回字段

1 个答案: