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DATETIME vs DATETIME2 Comparison
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- DATETIME Overview
- DATETIME stores dates from 1753 to 9999 using 8 bytes
- Supports basic date and time operations like adding days
- Can be used for variable declarations and table column definitions
- DATETIME2 Features
- Introduced in SQL Server 2008 with larger date range
- Supports dates from 0001 to 9999 using 6-8 bytes storage
- Can align with ANSI and ISO 8601 standards
- Offers higher precision for fractional seconds (7 digits)
- Key Differences
- DATETIME2 performs better precision but has different format
- DATETIME2 doesn't support basic math operations with dates
- DATETIME rounds fractional seconds to fit precision
- DATETIME2 is recommended over DATETIME for better performance