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Choosing the right data types is crucial for SQL Server database performance. Fixed-width types use consistent storage, while variable-width types add two bytes. Oversized data types waste storage and decelerate queries.
SQL Server operates with 8KB data page limits; thus, bigger data types lead to more pages and reduced speed. Developers must grasp SQL Server's data storage methods for efficient coding.
For further insights on database optimization via data type selection, consult the full paper.