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SQL SERVER – Fix : Error: 4064 – Cannot open user default database. Login failed. Login failed for user

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
282 Comments

I have received following question nearly 10 times in last week though emails. Many users have received following error while connecting to the database. This error happens when database is dropped for which is default for some of the database user. When user try to login and their default database is dropped following error shows up.

Cannot open user default database. Login failed.
Login failed for user ‘UserName’. (Microsoft SQL Server, Error: 4064)

SQL SERVER - Fix : Error: 4064 - Cannot open user default database. Login failed. Login failed for user error4064

The fix for this problem is very simple.

Fix/Workaround/Solution:

First click on Option>> Button of “Connect to Server” Prompt.

SQL SERVER - Fix : Error: 4064 - Cannot open user default database. Login failed. Login failed for user error4064_1

Now change the connect to database to any existing database on your server like master or msdb.

SQL SERVER - Fix : Error: 4064 - Cannot open user default database. Login failed. Login failed for user error4064_2

Now click on connect and it will successfully log you in. Once you login in the system run following statement for your username and it should fix your problem. Make sure to replace [test] with your username and master with yourdatabase name.

ALTER LOGIN [test] WITH DEFAULT_DATABASE = master
GO

SQL SERVER - Fix : Error: 4064 - Cannot open user default database. Login failed. Login failed for user error4064_3

Watch SQL in Sixty Seconds video to Resolve Connection Error:

[youtube=http://www.youtube.com/watch?v=1k00z82u4OI]

Reference : Pinal Dave (http://www.SQLAuthority.com)

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Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 22 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 14 SQL Server database books and 88 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://blog.sqlauthority.com.

Pinal is an experienced and dedicated professional with a deep commitment to flawless customer service. If you need help with any SQL Server Performance Tuning Issues, please feel free to reach out at pinal@sqlauthority.com.

Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).

Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.

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