`!= or in T-SQL: Which Inequality Operator Should You Choose?`

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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