Answer :
When you use SQL developer to connect to a database as a specific user, you have access to the database objects that are available to that user.
In order to work with SQL, SQL Developer offers robust editors. Execute, debug, test, and document your database programmes, create execution plans, export data to the preferred format (XML, Excel, HTML, PDF, etc.), and much more with SQL Developer.
An SQL Developer object called a database connection defines the details required to connect to a certain database as a particular user. To use SQL Developer, you must have at least one database connection.
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