如何使用查询从postgres中的表中的json数据类型中获取特定键值

Question

我的表（user_profile）中有一个数据类型为json的列（display_settings）。存储的值将在此格式中。

{"privacy":{"goals":"public","groups":"public","friends":"public","gVisibility":1,"cVisibility":1,"fVisibility":1},"name":"default","diary":{"font":{"family":"Arial","size":"14","color":"#000000","weight":"normal","bgcolor":"#ffffff","style":"normal","decoration":"none"}}}

我只想获得

的关键值

  

privacy.fVisibility

在postgress中使用查询。请建议我从json获取特定键值的方法。 json值也将从另一个选择查询中获得。

Answer 1

SELECT privacy->'fVisibiity'AS fVisibility FROM table_name;