Need Guidance on Appending new data to existing field of Json data type

Hello,

As i am new to Postgresql, i am learning through experimenting things.

i have a table with json data type field, so there is some data for
example :

{ [ { a:b, b:c } ] }

and now if i append data then it should be like :

{ [ { a:b, b:c }, { e:f, g:h } ] }

Is there any way to achieve this. please help.!

I have Postgresql 9.3.5

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Regards :
Venktesh Guttedar.