Getting the queried result in the form of json structure - Mailing list pgsql-sql

I am using postgresql for my webapplication. I am new to this
Postgresql-json. I Just want to get the select query result in the form of
json structure.
Here are my details:
   Create table   ============   - create table sample(id, serial, info jsonb);   Insert query   ============   -
insertinto sample("info") values('{"person": {"phone":
 
9804484234,"name":{"firstname":"Alice", "lastname":"bob"}, "empId": "E067",
"age":25}');      select query:   =============   select "info"->'person'->>'lastname' from sample;      result: bob
 but I want to get the above result along with the json nodes like below:      result: {"person":             {"name":
            {"lastname":"bob"}             }           }
 

could any tell me how to get my expected result structure from database.




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