This functionality was added in versions 9.2 and 9.4 that are unsupported now. I want to compare keys(predefined by me) by their values and the result of that should be the name of the key and not the value which later i will use to save to another column's rows. PostgreSQL has rich, built-in support for storing JSON columns and efficiently performing complex queries operations on them. Contrary to what your image shows, your fiddle has a single JSON blob, containing an array of objects, each with a tags array. For a long time PostgreSQL supports JSON fields and can even index them. Though to pull out specific keys, and details from JSON fields you will have to use the JSON operators and functions. Our focus here is going to be on the JSONB data type because it allows the contents to be indexed and queried with ease. The key difference between them is that JSON stores data in a raw format and JSONB stores data in a custom binary format.
Postgres json query comparing json fields how to#
I have table which has a column of type json with name "demographic". How to Query JSON fields in PostgreSQL You can get your JSON fields just like any other field. PostgreSQL has two native data types to store JSON documents: JSON and JSONB. This is a Spring Boot application that uses this library to persist JSON data (JSON Java Object) in a PostgreSQL json column and for querying JSON data from.
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