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Oracle provides the following categories of built-in datatypes: The character datatypes store character (alphanumeric) data in strings, with byte values corresponding to the character encoding scheme, generally called a character set or code page.The database's character set is established when you create the database.Generally, you want to provide the last name of the author and the specific page numbers of the source.A website is a collection of informational pages on the Internet.
When you create a table, you must specify a datatype for each of its columns.
Client sessions can use client character sets that are different from the database character set.
Consider the size of characters when you specify the column length for character datatypes.
Each value subsequently placed in a column assumes the data type of the column.
For example, if you insert value after verifying that it translates to a valid date.
Using Globalization support allows the use of various character sets for the character datatypes.