FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A data type is an attribute associated with a piece of data that tells a computer system how to interpret its value. Understanding data types ensures that data is collected in the preferred format and the value of each property is as expected.

Detailed explanation-2: -Alphanumeric data entry is when a person types data that is made of numbers and letters into a computer. They are typically entering this data into a database or spreadsheets. For example, a secretary may type a person’s address, which includes both numbers and letters, into their database.

Detailed explanation-3: -To store text we use a STRING data type. Think of a word or sentence as just a list (string) of characters.

Detailed explanation-4: -Answer: varchar is datatype for storing alphanumeric values in SQL . The varchar data type holds alphanumeric data; just like char but with flexible size, you just set the maximum number of characters, maximum size is 8, 000 character.