Question

我在postgresql数据库的列中有两个JSON数据行，看起来像这样。

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我想遍历详细信息，并使用postgresql中的查询仅获取“ from”键值。我想要它

{
  "details":[{"to":"0:00:00","from":"00:00:12"}]
}

{
  "details":[ 
             {"to":"13:01:11","from":"13:00:12"}, 
             {"to":"00:00:12","from":"13:02:11"}
            ]
}

Answer 1

使用jsonb_array_elements

select j->>'from' as "from" from t 
cross join jsonb_array_elements(s->'details') as j;

Demo

在PostgreSQL中对json数组元素进行迭代

1 个答案: