COMPUTER FUNDAMENTALS

Detailed explanation-1: -Character data types are strings of ASCII characters. Upper and lower case alphabetic characters are accepted literally. There are two fixed-length character data types, char and c, and two variable-length character data types: varchar and text. In compressed tables, trailing blanks are removed from char columns.

Detailed explanation-2: -Characters in ASCII encoding include upper-and lowercase letters A through Z, numerals 0 through 9 and basic punctuation symbols. It also uses some non-printing control characters that were originally intended for use with teletype printing terminals.

Detailed explanation-3: -A string of standard ASCII numeric characters. The Binary data type is used to parse any value and transform that value to an ASCII representation of the value internally in the Formatter.

Detailed explanation-4: -Character strings are the most commonly used data types. They can hold any sequence of letters, digits, punctuation, and other valid characters. Typical character strings are names, descriptions, and mailing addresses.