data-konzept

'SQL Server provides a number of settings for controlling access to data, metadata, and other SQL Server resources. For those who are new to SQL Server security or don’t manage security routinely, configuring these settings can seem a complex and confusing process. If you get the settings right, everybody is happy, but if you get them wrong, your users might not be able to access the data they need or, worse still, unauthorized users might be able to get at sensitive information or carry out malicious attacks.'...

https://www.simple-talk.com/sql/database-administration/sql-server-access-control-basics/