How to solve SQL Server Error 15174?
Login owns one or more database(s).
Change the owner of database(s) before dropping the login.
Check the database owner and then change the ownership to different login of identified databases to fix this issue.
More information about fixing this sql error >> https://ibmimedia.com/blog/124/solve-sql-error-15174
error 3729 sql server
cannot drop the user dbo
sql server error 15353
cannot drop schema because it is being referenced by object