Inequality operators in T-SQL: Choose != or ?
In T-SQL, both != and can be used to perform inequality checks. But which one should be preferred?
Most databases, including Microsoft SQL Server, support both operators. The != syntax is more commonly used in popular programming languages, while is ANSI compliant.
Databases that support both != and include:
- Apache Derby
- IBM Informix
- InterBase/Firebird
- Microsoft SQL Server
- MySQL
- Oracle
- PostgreSQL
- Sybase Adaptive Server
Databases that only support the ANSI standard operator are:
- IBM DB2 UDB
- Microsoft Access
Ultimately, the choice between != and comes down to personal preference and database compatibility. However, if ANSI standards compliance is a priority, is preferred.
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