Interactive SQL lets you type SQL statements interactively and
    see the results immediately. You can use interactive SQL for:

    o  Defining and maintaining your database

    o  Learning about SQL

    o  Testing and SQL applications and developing prototypes

    o  Performing small-scale data manipulation operations

    To run interactive SQL, define a symbol as follows:

    $ SQL :== $SQL$
    $ SQL

    Interactive SQL provides complete online help.