查询存储在数据库字段中的String中的特定值

Question

{"create_channel":"1","update_comm":"1","channels":"*"}

这是我要查询的数据库字段。

如果我想选择所有包含"create_channel": "1"和"update_comm": "1"

的记录，我的查询会是什么样子？

其他问题：

查看以下字段：

{"create_channel":"0","update_comm":"0","channels":[{"ch_id":"33","news":"1","parties":"1","questions ":"1","cam":"1","edit":"1","view_subs":"1","invite_subs":"1"},{"ch_id":"18","news":"1","parties":"1","questions ":"1","cam":"1","edit":"1","view_subs":"1","invite_subs":"1"}]}

我如何查找News，parties，questions和Cams部分中的所有子请点

Answer 1

您可以使用the ->> operator将成员作为字符串返回：

select  * 
from    YourTable 
where   YourColumn->>'create_channel' = '1' and
        YourColumn->>'update_comm' = '1'

要查找在第33频道中有新闻，参与方，问题和广告的用户，您可以使用the @> operator检查频道数组是否包含这些属性：

select  *
from    YourTable
where   YourColumn->'channels' @> '[{
            "ch_id":"33",
            "news":"1",
            "parties":"1",
            "questions ":"1",
            "cam":"1"
        }]';