List four possible ways (direct or indirect) to execute an SQL query against an Oracle Database?
Using the SQL*Plus command line tool. With this tool, you can directly execute SQL commands.
Using a GUI (Graphical User Interface) tool like SQL Developer. You can directly execute SQL commands with such tools.
Using Oracle Enterprise Manager. This is an indirect way of executing an SQL query. When you perform certain operations with Oracle Enterprise Manager, they are converted to SQL queries implicitly and these SQL queries are executed against the database.
Writing your own program. This is not a conventional way of executing your queries but actually it is widely used. Any web or windows program that uses Oracle database at backend, executes SQL queries. These programs are written using a programming language like .NET or JAVA and they use a driver to connect to database.
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