sql - 从 jsonb 列获取特定值

Question

我有一张表Customer

• 客户编号(整数)
• 客户姓名(字符串)
• 客户订单(jsonB)

customerOrders 具有以下结构:

{ 
 "nodeValue":[
   { 
      "key": "key1",
      "value": "value1"
   },
   { 
      "key": "key2",
      "value": "value2"
   },
   { 
      "key": "key3",
      "value": "value3"
   },
   { 
      "key": "key4",
      "value": "value4"
   },
   { 
      "key": "key5",
      "value": "value5"
   }
 ]
}

我正在尝试获取 key = 'key3' AND key = 'key4' 行的 nodeValue 的值。

例如:返回 'key3' 和 'key4' 的值，WHERE key = 'key3' AND key = 'key4'。

我正在尝试做类似的事情:

SELECT value, value 
from public.customers 
where nodeValue.key3 = 'key3' 
  AND nodeValue.key4 = 'key4'

Answer 1

with orders as 
(
   select jsonb_array_elements(customerOrders->'nodeValue') as orders
   from customers
) 
select orders->'value' as val 
from orders 
where 
    orders->>'key' = 'key3' 
or  orders->>'key' = 'key4';

结果:

值1

值2

请注意使用运算符 ->> 获取文本值

db-fiddle