Title: Define common data types.
Course: Database Design and Management (Oracle) (10052) > Section: Modifying and Managing Tables

Definition should include the concept that data types know two things about themselves:  the type of information that a variable can hold, and how large it can get.  This enforces business rules by constraining data in a way that completes effort checking before it gets to a higher level of checking. Description of data types should center around the types most often used, such as

- VARCHAR2()
- NUMBER()
- DATE
- CHAR
- LONG
- BLOB
- CLOB.