Microsoft SQL Server database ranks third in the relational database, second only to Oracle and MySQL database. when using it, it is inevitable to encounter various problems and warnnings. You may be dba or a developer, I hope this content can help you solve SQL Server error number 15157.

Error number: 15157

Severity level: 16

Event logged: Setuser failed because of one of the following reasons: the database principal ‘%.*ls’ does not exist, its corresponding server principal does not have server access, this type of database principal cannot be impersonated, or you do not have permission.