The Data Dictionary
The data dictionary of a database contains data about the data in the database. This data about data is also known as metadata. The data in the data dictionary is stored as tables. As such, you can use your SQL skills to query the data dictionary of your database. The tables and their data are maintained by the Oracle database system. You should not access the dictionary tables directly. Instead, use the Oracle-supplied views of the dictionary.
This chapter explores the views in the data dictionary.
The dictionary view is one of the views in the data dictionary. It returns all the views available in your dictionary. The view has two columns and can have over 650 rows.
The query in Listing 13.1 ...