How to query a full json array in postgresql?

by raven_corwin , in category: MySQL , a month ago

How to query a full json array in postgresql?

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1 answer

by giovanny.lueilwitz , a month ago

@raven_corwin 

To query a full JSON array in PostgreSQL, you can use the jsonb_array_elements() function. This function takes a JSON array as an input and returns a set of JSON elements, one for each element in the array.


Here's an example of how to query a full JSON array in PostgreSQL:

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SELECT jsonb_array_elements('[1, 2, 3, 4]'::jsonb);


This query will return a result set with each element of the JSON array as a separate row. You can then use this result set to filter, aggregate, or manipulate the individual elements as needed.


Keep in mind that jsonb_array_elements() only works with JSON arrays, not JSON objects. If you need to query a JSON object, you can use the jsonb_each() function instead.

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SELECT * FROM jsonb_each('{"a": 1, "b": 2}'::jsonb);


This query will return a result set with each key-value pair in the JSON object as a separate row.


Remember to cast the JSON input into the proper data type before applying the jsonb_array_elements() or jsonb_each() function.