PostgreSQL how to query json data based upon json attribs criteria

I am using PostgreSQL i want to store JSON data into table column. La开发者_如何转开发ter i want to retrieve data records criteria based upon JSON attributes. I know sort of this support available in MS SQL Server but i don't know that is it available in PostgreSQL or not.

How about using hstore and formatting it to JSON with these formatting functions?

Yes, take a look at json-datatype project from Google Summer of Code 2010 (especially check json.html) and this answer.