Postgresql加入jsonb

Question

我有桌子。

订单表：

id: integer
items: jsonb

项目表：

id: integer
title: string
price: integer

示例订单记录

id: 1, 
items: {
   "1"=>{"qty"=>3},
   "3"=>{"qty"=>12}
    }

示例项记录

 id:1, title: "Tesla model S"
 id:2, title: "Tesla model W"
 id:3, title: "Tesla model D"

请帮助获得结果：

id:1, title: "Tesla model S", qty: 3
id:3, title: "Tesla model D", qty: 12

Answer 1

最后，我做到了。 该查询有效。

        SELECT
        json_data.key AS id, 
        json_data.value::jsonb->'qty' AS qty,
        items.title as title 
        FROM orders, jsonb_each_text(orders.items) AS json_data
        INNER JOIN items ON items.id = json_data.key::int
        WHERE orders.id=1