How to use the decode command for Json values in SQL

There is an article about this problem:
https://docs.microsoft.com/en-us/sql/relational-databases/json/convert-json-data-to-rows-and-columns-with-openjson-sql-server

Which database engine? Above is about MS SQL 2016/Azure.

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oracle sql

I need any suggestions on how to use the json value in the select statement. Please advise

I need some examples on how to read the value inside the json column and use that as condition to write the condition. Please suggest any article or examples.

Your help is much appreciated.

If you use ORACLE, you can read these articles:
https://blogs.oracle.com/jsondb/the-new-sqljson-query-operators-part1:-jsonvalue
https://docs.oracle.com/database/121/ADXDB/json.htm#ADXDB6371

Finished from my side.