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SQL Server Error 4064 Login Failed For User: Error Explained & Resolved

Andrew Jackson ~ Modified: August 5th, 2025 ~ SQL, SQL Server Error ~ 5 Minutes Reading

Have you recently encountered the SQL Server Error 4064? This is an error that makes the databases inaccessible for the users and further creates issues with managing and accessing the data within the database. With the help of this write-up,we will learn more about what the error is and how it affects the user’s day to day tasks. Let’s begin by learning thoroughly about the SQL Server Error 4064.

What is SQL Server Login Failed For User Error 4064? 

The login failed error occurs when the user tries to connect to a SQL Server database but the database associated with that login is unavailable due to some reasons. There can be various reasons for the error to occur, here we will take a look at some of them:

  1. The database required does not exist in the SQL Server.
  2. SQL database is offline or inaccessible due to SUSPECT or RECOVERY mode.
  3. The database has been put in Single User mode.
  4. The user doesn’t have enough permissions to access the database. 
  5. Connection string used to connect to the database is incorrect. 

These are a few of the reasons that lead to the SQL Error 4064, impacting the users’ workflow and further creating various challenges for them. Let’s now take a look at the challenges and understand how the users are affected when the SQL Server error 4064 login failed for user occurs. 

Challenges Encountered Due to SQL Error Code 4064

Here are some major issues that the users encounter when the error occurs and further affects their workflow. 

  • The database becomes inaccessible and it gets complex to connect to the database. 
  • Error 4064 makes the database inaccessible further causing disruptions in the database operations.
  • The error also results in database downtime and affects the database performance.
  • With this SQL Server login failed for user error 4064, users might also face security and other access control challenges. 
  • The occurrence of this error can potentially lead to bigger issues and errors, compromising data security. 

With these challenges, it becomes important for the users to choose optimal solutions to resolve the error and log into the database. We will now take a look at the possible solutions that will allow the users to repair the database and carry out the required tasks. 

How to Repair SQL Server Error 4064 Login Failed for User? Best Methods Explained

We now know what the login failed for user error is about. To repair the error in an effective way, we will now take a look at the best possible way. Beginning with the first method, let’s understand how it works and how it can be implemented. 

Method 1: Try to Connect Using a Different Database

In this method, we will try to connect the user to a different database. This will allow the users to secure a connection, bypassing the database that is causing the error. The steps for this method are explained below:

  1. Open SQL Server Management Studio.
  2. From the connect to server dialog box, go to options. 
  3. In the Connection Properties tab, locate the master and connect to the master database. 

These steps will allow you to connect to the master database, instead of the database that was causing the error. Moving to the next method, let’s see how it is helpful in resolving the error 4064 SQL Server login failed. 

Method 2: Fix the Root Cause for Database Inaccessibility To Resolve SQL Error 4064

As we learned earlier, one of the causes for the error is the Suspect or Recovery Pending mode. Hence, for the users, it is required to find the actual cause and repair the issue accordingly. Here is the command that will help the users to recover the database from SUSPECT or recovery pending mode in SQL Server. 

ALTER DATABASE [DBName] SET EMERGENCY;
GO

DBCC CHECKDB ([DBName]);
GO

ALTER DATABASE [DBName] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
GO

DBCC CHECKDB ([DBName], REPAIR_ALLOW_DATA_LOSS);
GO

ALTER DATABASE [DBName] SET MULTI_USER;

However, there are certain situations where the users are not able to find the actual reasons for Suspect Database or SQL Server recovery pending state. The possible causes can be database damage or corruption. Furthermore, in such situations, it becomes risky to trust the manual methods, as the REPAIR_ALLOW_DATA_LOSS can possibly result in permanent data loss. In such situations, it is safer to trust an automated solution, like the SQL Database Recovery Tool, a utility that not only allows users to repair the error, but also recover any compromised data within the database. 

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Method 3: Grant the Required Permissions To Connect With the Database

In case the database is online and the user is still unable to connect to the database, there is a possibility that the user might not have sufficient permissions. This issue can be resolved by granting the user sufficient permissions to access the database. The commands for the same are given below:

USE [DBName];
GO

CREATE USER [LoginName] FOR LOGIN [LoginName];
ALTER ROLE db_datareader ADD MEMBER [LoginName];
ALTER ROLE db_datawriter ADD MEMBER [LoginName];

These permissions will enable users to perform the required tasks, such as reading and writing to the database. By granting these permissions, users can effectively resolve the error. With the help of these repair methods, users can simply resolve the error and seamlessly access the database without any issues. 

Conclusion

With the help of this write-up, we have learned about the SQL Server error 4064 login failed for user issue. Furthermore, we have also discussed the challenges the users might encounter due to the error and the best solutions that will allow the users to resolve them seamlessly and access the database in an efficient manner.