Question

你好朋友 我需要帮助来解决以下问题，

我在postgres db表中有一组记录，其中表具有JSONB类型的字段。

JSONB类型列包含以下JSON，

记录＃1：-

{
  "key1": "value1",
  "key2": "value2",
  "audience": [
    {
      "name": "Person1",
      "email": "test1@mail.com",
      "country": "UK",
      "primaryNumber": "+1234567890",
      "secondaryNumber": "+1234567890"
    },
    {
      "name": "Person2",
      "email": "test2@mail.com",
      "country": "UK",
      "primaryNumber": "+1234567890",
      "secondaryNumber": "+1234567890"
    }
  ]
}

记录＃2：-

{
  "key1": "value1",
  "key2": "value2",
  "audience": [
    {
      "name": "Person3",
      "email": "test3@mail.com",
      "country": "UK",
      "primaryNumber": "+1234567890",
      "secondaryNumber": "+1234567890"
    },
    {
      "name": "Person4",
      "email": "test4@mail.com",
      "country": "UK",
      "primaryNumber": "+1234567890",
      "secondaryNumber": "+1234567890"
    }
  ]
}

预期结果（吸引所有受众）：-

[
  {
    "name": "Person1",
    "email": "test1@mail.com",
    "country": "UK",
    "primaryNumber": "+1234567890",
    "secondaryNumber": "+1234567890"
  },
  {
    "name": "Person2",
    "email": "test2@mail.com",
    "country": "UK",
    "primaryNumber": "+1234567890",
    "secondaryNumber": "+1234567890"
  },
  {
    "name": "Person3",
    "email": "test3@mail.com",
    "country": "UK",
    "primaryNumber": "+1234567890",
    "secondaryNumber": "+1234567890"
  },
  {
    "name": "Person4",
    "email": "test4@mail.com",
    "country": "UK",
    "primaryNumber": "+1234567890",
    "secondaryNumber": "+1234567890"
  }
]

任何人都可以{strong>帮助我设计查询吗？native query还是通过spring-data-jpa？

如果有人能帮助我解决这种情况，我将非常感谢！

Answer 1

您应该使用'audience'提取每一行的jsonb_array_elements()个数组元素，并使用jsonb_agg()将它们聚合到单个json对象中：

select jsonb_agg(value)
from my_table
cross join jsonb_array_elements(json_data->'audience')

Working example in rextester.

Postgres JSONB数据类型-如何从Postgres数据库的JSON（类型为JsonB）字段中提取数据？

1 个答案: