How to create postgres table with JSON? - json

Question

Latest release of PostgreSQL have capabilities to work like document oriented databases (e.g. MongoDB). There Is promising benchmarks that says postgres x times faster then mongo. Can someone give me advice how to work with postgres as with MongoDB. I'm seeking for step by step simple example concerned on
1) How to create simpliest table that contain JSON/JSONB objects like documents in mongodb
2) How to make search on it at least by id, like I can do in mongodb with collection.find({id: 'objectId'}) for example
3) How to create new object or overwrite existing at least by id, like I can do in mongodb with
collection.update(
{id: objectId},
{$set: someSetObject, $unset: someUnsetObject}
{upsert: true, w: 1}
)
4) How to delete object if it exists at leas by id, like I can do in mongodb with collection.remove({id: 'objectId'})

Answer 1

It's too large topic to be covered in one answer. So there is just some examples as requested. For more information see documentation:
8.14. JSON Types
9.15. JSON Functions and Operators
Create table:
create table test(
id serial primary key,
data jsonb);
Search by id:
select * from test where id = 1;
Search by json value:
select * from test where data->>'a' = '1';
Insert and update data:
insert into test(id, data) values (1, '{"a": 1, "b": 2, "c": 3}');
update test set data = data - 'a' || '{"c": 5}' where id = 1;
Delete data by id:
delete from test where id = 1;
Delete data by json value:
delete from test where data->>'b' = '2';