Sql constraintsa constraint is a rule or limitation that we place on the data in a database that we can put into a column(s). a constraint is part of the table. we can apply constraints when we create ...

According to the ANSI standards SQL:92, SQL:1999, and SQL:2003, a UNIQUE constraint should disallow duplicate non-NULL values, but allow multiple NULL values. SQL Server has always implemented a ...

I found that if you have a table that has a lot of columns in it's primary key, it is possible to make EF Core generate invalid SQL Server identifiers for unique constraints that it generates. I.e.

In mobile environments data from a client database often has to be integrated into a server database during a synchronization process. Thereby unique constraint violations are possible if the client ...