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CHAR vs Varchar in SQL Server

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Basic Differences: Char stores fixed-length character strings using static memory
Varchar stores variable-length strings up to 255 bytes
Char uses n bytes of storage, Varchar uses n bytes plus 2 bytes
Additional Information: SQL server supports various data types including numeric, date, and character strings
Varchar is better but should be used only when necessary
Char allocates only required memory, Varchar uses wasted space
Implementation: Both types can store letters, numbers, and symbols
Example: CHAR(20) stores single character, VARCHAR(50) stores multiple characters
Example: CREATE TABLE Employee(Name VARCHAR(50), Designation CHAR(20))