Learn how to create, drop, and manage a unique constraint using SQL and some best practices to follow. A unique constraint prevents data duplication and ensures data integrity.

With ALTER TABLE, the partial unique constraint isn't actually created correctly, right? In which case, I would prefer we disallow this since it creates a false impression of success.

Technical documentation for Microsoft SQL Server, tools such as SQL Server Management Studio (SSMS) , SQL Server Data Tools (SSDT) etc. - MicrosoftDocs/sql-docs ...