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SQL Server error 18456 cannot connect – SQL Server 2017 LOGIN FAILED ERROR 18456

SQL Server error 18456 cannot connect – SQL Server 2017 LOGIN FAILED ERROR 18456

Normally error code comes up with a description that gives us a hint about what has gone wrong. But in this case of SQL Server error 18456 on screen, no cause of login failure is displayed. This is an intended development of the application in order to have protection against unauthorized users hacking the server on basis of guess information. However, the administrator can check out the event log in order to get details about occurrence of SQL Server error 18456.

Cause of this error of Microsoft SQL Server login failed error 18456:

1: At the time of Server login, if either of username or password … Read the rest

sql server DBA 999

SQL Server- Unable to connect to SQL Express Error: 26-Error Locating Server/Instance Specified

Error Description:

SQL server error 26- Unable to connect to SQL Express Error: 26-Error Locating Server/Instance Specified

How to fix SQL server Unable to connect

Error Details: this sql server error 26 error locating server instance message is often encountered when connection to a SQL Server is tried and don’t know where to start to solve the problem.

We get this sql server error 26 error message only when we are trying to connect to a SQL Server named instance.

Every time we try to make a connection to SQL Server named instance, we will send a SSRP UDP packet to the server machine UDP port 1434. We need this step to know configuration information of the SQL instance, e.g., protocols enabled, TCP port, pipe name etc. Without … Read the rest

sql server DBA 999

SQL Server- a network-related or instance-specific error occurred while establishing a connection to sql server

SQL Server- a network-related or instance-specific error occurred while establishing a connection to sql server

Error Details or symptoms: Can not connect to a SQL server and you get a error a network-related or instance-specific error occurred while establishing a connection to sql server

This error is seen in SQL Express installation as its installed a named instance by default with name of instance as Servername/SQLExpress.

Some other Errors Similar:

provider: named pipes provider, error: 40 – could not open a connection to sql server which is covered here.

provider: sql network interfaces, error: 26 – error locating server/instance specified which is covered here.

Resolution:

If we are connecting from Windows PC/Client to Windows server/SQL Server (server with SQL Server … Read the rest

sql server DBA 999

SQL Server error 40 could not open a connection to sql server 2016

SQL Server error 40 could not open a connection to sql server 2016

Error related are:
error 40 could not open a connection to sql server

named pipes provider could not open a connection to sql server 53

invoke sqlcmd provider named pipes provider error 40 could not open a connection to sql server

named pipes provider could not open a connection to sql server 5 linked server

I have covered this error in another post as well which is here.

Cause of Error:

This error occurs when the SQL Server can’t be found on Network which means either IP address is not reachable or that the TCP port number is either not open or is not the correct port … Read the rest

sql server DBA 999

SQL Server- Identify location of the SQL Server Error Log file

The SQL Server Error Log file is per SQL Server instance. A DBA can identify the location of the SQL Server Error Log file used by an instance of SQL Server easily.

Finding location of Windows Error logs

DBA can identify SQL Server Error Log file used by SQL Server Database Engine Using Application Event Viewer

  •  Click Start -> All Programs -> Administrative Tools -> Server Manager.

Finding location of SQL Server error log in Windows Error logs

  •  In Server Manager-> expand Diagnostics-> expand Event Viewer-> expand Windows Logs and then select Application on the left side panel. In the right panel you need to filter for events with Event ID 17111.
  • The location of SQL Server Error Log file
… Read the rest