如何將Json數據導入Postgres表

Question

我有一個API，可提供名為CorporateHoliday.txt的 json數據文本文件。

數據如下所示：

{
    "holiday_id":"1712010100000104",
    "holiday_date":"2018-12-30 00:00:00.0",
    "holiday_description":"SUNDAY",
    "holiday_status":"A"
},
{
    "holiday_id":"1712010100000103",
    "holiday_date":"2018-12-29 00:00:00.0",
    "holiday_description":"SATURDAY",
    "holiday_status":"A"
}

我的postgres表屬性看起來像這樣t_leave_holida（objectid，holiday_date，description，recstatus）

我想將這些json數據從txt文件導入到postgres數據庫表中？

Answer 1

您可以使用jsonb類型，而只需從json中選擇數據，例如：

db=# create table t_leave_holida(objectid bigint, holiday_date timestamp(1), description text,recstatus text);
db=# insert into t_leave_holida select (d->>'holiday_id')::bigint, (d->>'holiday_date')::timestamp, d->>'holiday_description', d->>'holiday_status' from (select '{
    "holiday_id":"1712010100000104",
    "holiday_date":"2018-12-30 00:00:00.0",
    "holiday_description":"SUNDAY",
    "holiday_status":"A"
}'::jsonb d) ali;
INSERT 0 1
db=# select * from t_leave_holida;
     objectid     |    holiday_date     | description | recstatus
------------------+---------------------+-------------+-----------
 1712010100000104 | 2018-12-30 00:00:00 | SUNDAY      | A
(1 row)

Answer 2

構造一個json數組，我們可以將所有記錄插入t_leave_holida

insert into t_leave_holida(objectid, holiday_date,description,recstatus)
  select holiday_id,holiday_date,holiday_description,holiday_status from
  json_to_recordset(
   '[
      {
        "holiday_id":"1712010100000104",
        "holiday_date":"2018-12-30 00:00:00.0",
        "holiday_description":"SUNDAY",
        "holiday_status":"A"
      },
      {
        "holiday_id":"1712010100000103",
        "holiday_date":"2018-12-29 00:00:00.0",
        "holiday_description":"SATURDAY",
        "holiday_status":"A"
      }
    ]'
  ) as x(holiday_id bigint, holiday_date date, holiday_description text,holiday_status text);