| The following typographical conventions are used in this book: -
- Italic
-
Used for file and directory names , example URLs, emphasis, and new terms where they are defined. -
- Constant width
-
Used for code examples and literals. -
- Constant width italic
-
In code examples, indicates an element (e.g., a parameter) that you supply. -
- UPPERCASE
-
Generally indicates Oracle keywords. -
- lowercase
-
In code examples, generally indicates user -defined items such as variables . | | This icon indicates a tip, suggestion, or general note. For example, we'll tell you if you need to use a particular version of Oracle or if an operation requires certain privileges. | | | | This icon indicates a warning or caution. For example, we'll tell you if Oracle doesn't behave as you'd expect or if a particular operation negatively impacts performance. | | |