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T-SQL Not Equal Comparison: `!=` or `` – Which Operator Should You Use?
- Susan SarandonOriginal
- 2025-01-20 18:33:09878browse
Best syntax for inequality comparison in T-SQL: != vs. < >
When comparing values in T-SQL, programmers can use two ways of expressing inequalities: != and < >. This article explores the differences between these two operators and guides you in choosing which one is better.
Operator Compatibility
T-SQL supports != and < > as inequality comparisons. However, it is important to note that different databases may support only one of these operators, or prefer one over the other.
Most databases support != and < >:
- Apache Derby 10.16
- IBM Informix Dynamic Server 14.10
- InterBase/Firebird
- Microsoft SQL Server 2000/2005/2008/2012/2016
- Mimer SQL 11.0
- MySQL 8.0.33
- Oracle 23c
- PostgreSQL 15
- Sybase Adaptive Server Enterprise 16.0
Only supports < > databases (ANSI standard):
- IBM DB2 UDB 9.5
- Microsoft Access 2010
Suggestion
While != is more commonly used in popular programming languages like C#, < > is recommended as the preferred syntax for inequality comparisons in T-SQL. This complies with ANSI standards and ensures compatibility across various database platforms.
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