The significant difference is that the json data type stores an exact copy of the input. In general, most applications should prefer to store JSON data as jsonb, unless there are quite specialized needs, such as legacy assumptions about the ordering of object keys. It can often be advantageous to record data received from an API or other service in its raw form for auditing or other purposes.ĭifference Between json and jsonb Data Types in PostgreSQLĪccording to the PostgreSQL documentation,
Storage of Data Reported from External Systems Web data received from an API or a form is often in JSON format. Therefore, keeping it in its original form and querying only what is needed can significantly improve efficiency. Often, complex objects represented as JSON are challenging to normalize into a traditional data table or column. Storage of Complex Data Objects One of the main advantages of JSON is its ability to represent nearly any kind of object with nesting. One additional benefit with JSON and PostgreSQL is if a particular key always appears in the JSON data, such as an ID or name, it can be parsed and created as a table column to make querying and indexing faster and easier. Flexibility Storing data as JSON is beneficial for when the data schema frequently changes, for example, when using an audit trigger to track changes to a database table made over time or tags that consist of user-defined key/value pairs, and so on. The benefits of storing semi-structured data such as JSON include: The PostgreSQL team’s improvements for working with JSON are meant to help keep PostgreSQL competitive with NoSQL databases. With the rise of the web and the resulting increase in JSON data, document store databases (also known as NoSQL databases) such as MongoDB and Apache Cassandra have become increasingly popular for storing and managing non-relational data. 
#Java json query example how to
In this post, we will explore how to query JSON data in PostgreSQL and the various JSON data types available, and their pros and cons.
In PostgreSQL version 12, the ability to query json and jsonb data types directly using a newly added JSON data type named jsonpath was released, making it even easier to interact with JSON stored in PostgreSQL tables. Support for working with JSON in PostgreSQL has become increasingly powerful since it was first introduced in version 9.2.
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