在 PostgreSQL 12 中提取 JsonB 字典的元素

Question

我看过类似的问题，但我找不到如何将字典存储在：

Table答：id int,data jsonb

For example:

id = 1
data = {"Key1": 1, "Key2": "a2", "Key3": [3, 4]}

到Table B:id int, key text, payload jsonb

Using the same example as above, I would get the 3 records:

id  Key    payload
--------------------
1   Key1        1
1   Key2   "a2"
1   Key3   [3, 4]

在此先感谢您的帮助！

Answer 1

使用jsonb_each():

insert into table_b
select id, key, payload
  from table_a
 cross join lateral jsonb_each(data) as e(key, payload);

在 PostgreSQL 12 中提取 JsonB 字典的元素

Extracting the elements of a JsonB dictionary in PostgreSQL 12

postgresql

json

dictionary

jsonb